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Finding the Fourth Proportional to 482,992.80, 724,456.80 and 127,999.20

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Solution

The fourth proportional to 482,992.80, 724,456.80 and 127,999.20 is: 191,990.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    482,992.80 : 724,456.80 = 127,999.20 : x
  2. Step 2: Convert to fraction form
    482,992.80/724,456.80 = 127,999.20/x
  3. Step 3: Cross multiply
    482,992.80x = 724,456.80 × 127,999.20
  4. Step 4: Simplify right side
    482,992.80x = 92,729,890,834.56
  5. Step 5: Solve for x
    x = 92,729,890,834.56/482,992.80
  6. Step 6: Final answer
    x = 191,990.21

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1.5x scale

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.