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Finding the Fourth Proportional to 285.91, 428.97 and 93.53

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Solution

The fourth proportional to 285.91, 428.97 and 93.53 is: 140.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.91 : 428.97 = 93.53 : x
  2. Step 2: Convert to fraction form
    285.91/428.97 = 93.53/x
  3. Step 3: Cross multiply
    285.91x = 428.97 × 93.53
  4. Step 4: Simplify right side
    285.91x = 40,121.56
  5. Step 5: Solve for x
    x = 40,121.56/285.91
  6. Step 6: Final answer
    x = 140.33

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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.