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Finding the Fourth Proportional to 424.71, 585.54 and 306.59

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Solution

The fourth proportional to 424.71, 585.54 and 306.59 is: 422.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.71 : 585.54 = 306.59 : x
  2. Step 2: Convert to fraction form
    424.71/585.54 = 306.59/x
  3. Step 3: Cross multiply
    424.71x = 585.54 × 306.59
  4. Step 4: Simplify right side
    424.71x = 179,517.78
  5. Step 5: Solve for x
    x = 179,517.78/424.71
  6. Step 6: Final answer
    x = 422.68

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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.