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Finding the Fourth Proportional to 518,275.72, 777,475.88 and 489,932.20

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Solution

The fourth proportional to 518,275.72, 777,475.88 and 489,932.20 is: 734,957.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,275.72 : 777,475.88 = 489,932.20 : x
  2. Step 2: Convert to fraction form
    518,275.72/777,475.88 = 489,932.20/x
  3. Step 3: Cross multiply
    518,275.72x = 777,475.88 × 489,932.20
  4. Step 4: Simplify right side
    518,275.72x = 380,910,469,503.48
  5. Step 5: Solve for x
    x = 380,910,469,503.48/518,275.72
  6. Step 6: Final answer
    x = 734,957.19

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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.