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Finding the Fourth Proportional to 414.73, 572.18 and 257.30

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Solution

The fourth proportional to 414.73, 572.18 and 257.30 is: 354.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.73 : 572.18 = 257.30 : x
  2. Step 2: Convert to fraction form
    414.73/572.18 = 257.30/x
  3. Step 3: Cross multiply
    414.73x = 572.18 × 257.30
  4. Step 4: Simplify right side
    414.73x = 147,223.02
  5. Step 5: Solve for x
    x = 147,223.02/414.73
  6. Step 6: Final answer
    x = 354.99

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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.