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Finding the Fourth Proportional to 717,527.16, 990,182.88 and 395,229.78

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Solution

The fourth proportional to 717,527.16, 990,182.88 and 395,229.78 is: 545,414.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,527.16 : 990,182.88 = 395,229.78 : x
  2. Step 2: Convert to fraction form
    717,527.16/990,182.88 = 395,229.78/x
  3. Step 3: Cross multiply
    717,527.16x = 990,182.88 × 395,229.78
  4. Step 4: Simplify right side
    717,527.16x = 391,349,761,822.17
  5. Step 5: Solve for x
    x = 391,349,761,822.17/717,527.16
  6. Step 6: Final answer
    x = 545,414.56

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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.