Home / 717,686.12-990,395.21-391,003.02

Finding the Fourth Proportional to 717,686.12, 990,395.21 and 391,003.02

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Solution

The fourth proportional to 717,686.12, 990,395.21 and 391,003.02 is: 539,577.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,686.12 : 990,395.21 = 391,003.02 : x
  2. Step 2: Convert to fraction form
    717,686.12/990,395.21 = 391,003.02/x
  3. Step 3: Cross multiply
    717,686.12x = 990,395.21 × 391,003.02
  4. Step 4: Simplify right side
    717,686.12x = 387,247,516,148.52
  5. Step 5: Solve for x
    x = 387,247,516,148.52/717,686.12
  6. Step 6: Final answer
    x = 539,577.83

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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.