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Finding the Fourth Proportional to 482,990.80, 724,453.80 and 127,997.20

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Solution

The fourth proportional to 482,990.80, 724,453.80 and 127,997.20 is: 191,987.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    482,990.80 : 724,453.80 = 127,997.20 : x
  2. Step 2: Convert to fraction form
    482,990.80/724,453.80 = 127,997.20/x
  3. Step 3: Cross multiply
    482,990.80x = 724,453.80 × 127,997.20
  4. Step 4: Simplify right side
    482,990.80x = 92,728,057,929.36
  5. Step 5: Solve for x
    x = 92,728,057,929.36/482,990.80
  6. Step 6: Final answer
    x = 191,987.21

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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.