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Finding the Fourth Proportional to 482,787.75, 724,249.30 and 145,790.20

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Solution

The fourth proportional to 482,787.75, 724,249.30 and 145,790.20 is: 218,705.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    482,787.75 : 724,249.30 = 145,790.20 : x
  2. Step 2: Convert to fraction form
    482,787.75/724,249.30 = 145,790.20/x
  3. Step 3: Cross multiply
    482,787.75x = 724,249.30 × 145,790.20
  4. Step 4: Simplify right side
    482,787.75x = 105,588,450,296.86
  5. Step 5: Solve for x
    x = 105,588,450,296.86/482,787.75
  6. Step 6: Final answer
    x = 218,705.74

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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.