Home / 838,799,121.88-1,258,505,489.86-390,316,406.43

Finding the Fourth Proportional to 838,799,121.88, 1,258,505,489.86 and 390,316,406.43

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Solution

The fourth proportional to 838,799,121.88, 1,258,505,489.86 and 390,316,406.43 is: 585,617,375.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    838,799,121.88 : 1,258,505,489.86 = 390,316,406.43 : x
  2. Step 2: Convert to fraction form
    838,799,121.88/1,258,505,489.86 = 390,316,406.43/x
  3. Step 3: Cross multiply
    838,799,121.88x = 1,258,505,489.86 × 390,316,406.43
  4. Step 4: Simplify right side
    838,799,121.88x = 491,215,340,274,581,952
  5. Step 5: Solve for x
    x = 491,215,340,274,581,952/838,799,121.88
  6. Step 6: Final answer
    x = 585,617,375.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.