Home / 1,388,221,057.21-1,915,780,311.54-761,689,319.08

Finding the Fourth Proportional to 1,388,221,057.21, 1,915,780,311.54 and 761,689,319.08

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Solution

The fourth proportional to 1,388,221,057.21, 1,915,780,311.54 and 761,689,319.08 is: 1,051,150,602.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,221,057.21 : 1,915,780,311.54 = 761,689,319.08 : x
  2. Step 2: Convert to fraction form
    1,388,221,057.21/1,915,780,311.54 = 761,689,319.08/x
  3. Step 3: Cross multiply
    1,388,221,057.21x = 1,915,780,311.54 × 761,689,319.08
  4. Step 4: Simplify right side
    1,388,221,057.21x = 1,459,229,401,003,772,928
  5. Step 5: Solve for x
    x = 1,459,229,401,003,772,928/1,388,221,057.21
  6. Step 6: Final answer
    x = 1,051,150,602.73

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Half scale
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Double scale
Find fourth proportional to 1,388,221,058.21, 1,915,780,312.92 and 761,689,320.08
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.