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Finding the Fourth Proportional to 257.43, 387.07 and 237.39

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Solution

The fourth proportional to 257.43, 387.07 and 237.39 is: 356.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.43 : 387.07 = 237.39 : x
  2. Step 2: Convert to fraction form
    257.43/387.07 = 237.39/x
  3. Step 3: Cross multiply
    257.43x = 387.07 × 237.39
  4. Step 4: Simplify right side
    257.43x = 91,886.55
  5. Step 5: Solve for x
    x = 91,886.55/257.43
  6. Step 6: Final answer
    x = 356.94

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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.