Home / 717,780.64-990,538.40-391,092.16

Finding the Fourth Proportional to 717,780.64, 990,538.40 and 391,092.16

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Solution

The fourth proportional to 717,780.64, 990,538.40 and 391,092.16 is: 539,707.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,780.64 : 990,538.40 = 391,092.16 : x
  2. Step 2: Convert to fraction form
    717,780.64/990,538.40 = 391,092.16/x
  3. Step 3: Cross multiply
    717,780.64x = 990,538.40 × 391,092.16
  4. Step 4: Simplify right side
    717,780.64x = 387,391,802,418.94
  5. Step 5: Solve for x
    x = 387,391,802,418.94/717,780.64
  6. Step 6: Final answer
    x = 539,707.79

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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.