Home / 1,216,566,119.82-1,678,894,256.88-688,009,145.88

Finding the Fourth Proportional to 1,216,566,119.82, 1,678,894,256.88 and 688,009,145.88

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Solution

The fourth proportional to 1,216,566,119.82, 1,678,894,256.88 and 688,009,145.88 is: 949,471,290.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216,566,119.82 : 1,678,894,256.88 = 688,009,145.88 : x
  2. Step 2: Convert to fraction form
    1,216,566,119.82/1,678,894,256.88 = 688,009,145.88/x
  3. Step 3: Cross multiply
    1,216,566,119.82x = 1,678,894,256.88 × 688,009,145.88
  4. Step 4: Simplify right side
    1,216,566,119.82x = 1,155,094,603,698,846,208
  5. Step 5: Solve for x
    x = 1,155,094,603,698,846,208/1,216,566,119.82
  6. Step 6: Final answer
    x = 949,471,290.45

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Half scale
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Double scale
Find fourth proportional to 1,216,566,120.82, 1,678,894,258.26 and 688,009,146.88
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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.