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Finding the Fourth Proportional to 482,915.30, 724,340.55 and 127,921.70

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Solution

The fourth proportional to 482,915.30, 724,340.55 and 127,921.70 is: 191,873.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    482,915.30 : 724,340.55 = 127,921.70 : x
  2. Step 2: Convert to fraction form
    482,915.30/724,340.55 = 127,921.70/x
  3. Step 3: Cross multiply
    482,915.30x = 724,340.55 × 127,921.70
  4. Step 4: Simplify right side
    482,915.30x = 92,658,874,534.94
  5. Step 5: Solve for x
    x = 92,658,874,534.94/482,915.30
  6. Step 6: Final answer
    x = 191,873.97

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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.