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Finding the Fourth Proportional to 248.81, 372.88 and 140.54

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Solution

The fourth proportional to 248.81, 372.88 and 140.54 is: 210.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.81 : 372.88 = 140.54 : x
  2. Step 2: Convert to fraction form
    248.81/372.88 = 140.54/x
  3. Step 3: Cross multiply
    248.81x = 372.88 × 140.54
  4. Step 4: Simplify right side
    248.81x = 52,403.85
  5. Step 5: Solve for x
    x = 52,403.85/248.81
  6. Step 6: Final answer
    x = 210.62

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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.