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Finding the Fourth Proportional to 248.72, 372.54 and 171.68

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Solution

The fourth proportional to 248.72, 372.54 and 171.68 is: 257.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.72 : 372.54 = 171.68 : x
  2. Step 2: Convert to fraction form
    248.72/372.54 = 171.68/x
  3. Step 3: Cross multiply
    248.72x = 372.54 × 171.68
  4. Step 4: Simplify right side
    248.72x = 63,957.67
  5. Step 5: Solve for x
    x = 63,957.67/248.72
  6. Step 6: Final answer
    x = 257.15

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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.