Home / 1,389,962,893.74-1,918,186,251.45-817,785,886.20

Finding the Fourth Proportional to 1,389,962,893.74, 1,918,186,251.45 and 817,785,886.20

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Solution

The fourth proportional to 1,389,962,893.74, 1,918,186,251.45 and 817,785,886.20 is: 1,128,566,561.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,962,893.74 : 1,918,186,251.45 = 817,785,886.20 : x
  2. Step 2: Convert to fraction form
    1,389,962,893.74/1,918,186,251.45 = 817,785,886.20/x
  3. Step 3: Cross multiply
    1,389,962,893.74x = 1,918,186,251.45 × 817,785,886.20
  4. Step 4: Simplify right side
    1,389,962,893.74x = 1,568,665,643,538,694,400
  5. Step 5: Solve for x
    x = 1,568,665,643,538,694,400/1,389,962,893.74
  6. Step 6: Final answer
    x = 1,128,566,561.46

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Double scale
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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.