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Finding the Fourth Proportional to 248.17, 372.31 and 74.83

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Solution

The fourth proportional to 248.17, 372.31 and 74.83 is: 112.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.17 : 372.31 = 74.83 : x
  2. Step 2: Convert to fraction form
    248.17/372.31 = 74.83/x
  3. Step 3: Cross multiply
    248.17x = 372.31 × 74.83
  4. Step 4: Simplify right side
    248.17x = 27,858.10
  5. Step 5: Solve for x
    x = 27,858.10/248.17
  6. Step 6: Final answer
    x = 112.25

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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.