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Finding the Fourth Proportional to 482,982.80, 724,441.80 and 127,989.20

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Solution

The fourth proportional to 482,982.80, 724,441.80 and 127,989.20 is: 191,975.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    482,982.80 : 724,441.80 = 127,989.20 : x
  2. Step 2: Convert to fraction form
    482,982.80/724,441.80 = 127,989.20/x
  3. Step 3: Cross multiply
    482,982.80x = 724,441.80 × 127,989.20
  4. Step 4: Simplify right side
    482,982.80x = 92,720,726,428.56
  5. Step 5: Solve for x
    x = 92,720,726,428.56/482,982.80
  6. Step 6: Final answer
    x = 191,975.21

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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.