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Finding the Fourth Proportional to 482,974.80, 724,429.80 and 127,981.20

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Solution

The fourth proportional to 482,974.80, 724,429.80 and 127,981.20 is: 191,963.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    482,974.80 : 724,429.80 = 127,981.20 : x
  2. Step 2: Convert to fraction form
    482,974.80/724,429.80 = 127,981.20/x
  3. Step 3: Cross multiply
    482,974.80x = 724,429.80 × 127,981.20
  4. Step 4: Simplify right side
    482,974.80x = 92,713,395,119.76
  5. Step 5: Solve for x
    x = 92,713,395,119.76/482,974.80
  6. Step 6: Final answer
    x = 191,963.21

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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.