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Finding the Fourth Proportional to 248.90, 372.85 and 118.72

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Solution

The fourth proportional to 248.90, 372.85 and 118.72 is: 177.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.90 : 372.85 = 118.72 : x
  2. Step 2: Convert to fraction form
    248.90/372.85 = 118.72/x
  3. Step 3: Cross multiply
    248.90x = 372.85 × 118.72
  4. Step 4: Simplify right side
    248.90x = 44,264.75
  5. Step 5: Solve for x
    x = 44,264.75/248.90
  6. Step 6: Final answer
    x = 177.84

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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.