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Finding the Fourth Proportional to 482,972.80, 724,426.80 and 127,979.20

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Solution

The fourth proportional to 482,972.80, 724,426.80 and 127,979.20 is: 191,960.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    482,972.80 : 724,426.80 = 127,979.20 : x
  2. Step 2: Convert to fraction form
    482,972.80/724,426.80 = 127,979.20/x
  3. Step 3: Cross multiply
    482,972.80x = 724,426.80 × 127,979.20
  4. Step 4: Simplify right side
    482,972.80x = 92,711,562,322.56
  5. Step 5: Solve for x
    x = 92,711,562,322.56/482,972.80
  6. Step 6: Final answer
    x = 191,960.21

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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.