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Finding the Fourth Proportional to 414.88, 572.30 and 387.54

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Solution

The fourth proportional to 414.88, 572.30 and 387.54 is: 534.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.88 : 572.30 = 387.54 : x
  2. Step 2: Convert to fraction form
    414.88/572.30 = 387.54/x
  3. Step 3: Cross multiply
    414.88x = 572.30 × 387.54
  4. Step 4: Simplify right side
    414.88x = 221,789.14
  5. Step 5: Solve for x
    x = 221,789.14/414.88
  6. Step 6: Final answer
    x = 534.59

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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.