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Finding the Fourth Proportional to 257.27, 386.82 and 237.20

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Solution

The fourth proportional to 257.27, 386.82 and 237.20 is: 356.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.27 : 386.82 = 237.20 : x
  2. Step 2: Convert to fraction form
    257.27/386.82 = 237.20/x
  3. Step 3: Cross multiply
    257.27x = 386.82 × 237.20
  4. Step 4: Simplify right side
    257.27x = 91,751.77
  5. Step 5: Solve for x
    x = 91,751.77/257.27
  6. Step 6: Final answer
    x = 356.64

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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.