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Finding the Fourth Proportional to 248.74, 372.80 and 140.30

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Solution

The fourth proportional to 248.74, 372.80 and 140.30 is: 210.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.74 : 372.80 = 140.30 : x
  2. Step 2: Convert to fraction form
    248.74/372.80 = 140.30/x
  3. Step 3: Cross multiply
    248.74x = 372.80 × 140.30
  4. Step 4: Simplify right side
    248.74x = 52,305.12
  5. Step 5: Solve for x
    x = 52,305.12/248.74
  6. Step 6: Final answer
    x = 210.28

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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.