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Finding the Fourth Proportional to 574.54, 861.78 and 281.14

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Solution

The fourth proportional to 574.54, 861.78 and 281.14 is: 421.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.54 : 861.78 = 281.14 : x
  2. Step 2: Convert to fraction form
    574.54/861.78 = 281.14/x
  3. Step 3: Cross multiply
    574.54x = 861.78 × 281.14
  4. Step 4: Simplify right side
    574.54x = 242,280.83
  5. Step 5: Solve for x
    x = 242,280.83/574.54
  6. Step 6: Final answer
    x = 421.70

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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.