Home / 1,389,962,886.34-1,918,186,241.30-817,785,878.81

Finding the Fourth Proportional to 1,389,962,886.34, 1,918,186,241.30 and 817,785,878.81

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Solution

The fourth proportional to 1,389,962,886.34, 1,918,186,241.30 and 817,785,878.81 is: 1,128,566,551.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,962,886.34 : 1,918,186,241.30 = 817,785,878.81 : x
  2. Step 2: Convert to fraction form
    1,389,962,886.34/1,918,186,241.30 = 817,785,878.81/x
  3. Step 3: Cross multiply
    1,389,962,886.34x = 1,918,186,241.30 × 817,785,878.81
  4. Step 4: Simplify right side
    1,389,962,886.34x = 1,568,665,621,058,682,368
  5. Step 5: Solve for x
    x = 1,568,665,621,058,682,368/1,389,962,886.34
  6. Step 6: Final answer
    x = 1,128,566,551.29

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Double scale
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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.