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Finding the Fourth Proportional to 285,874.40, 394,530.90 and 158,591

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Solution

The fourth proportional to 285,874.40, 394,530.90 and 158,591 is: 218,869.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,874.40 : 394,530.90 = 158,591 : x
  2. Step 2: Convert to fraction form
    285,874.40/394,530.90 = 158,591/x
  3. Step 3: Cross multiply
    285,874.40x = 394,530.90 × 158,591
  4. Step 4: Simplify right side
    285,874.40x = 62,569,049,961.90
  5. Step 5: Solve for x
    x = 62,569,049,961.90/285,874.40
  6. Step 6: Final answer
    x = 218,869.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.