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Finding the Fourth Proportional to 252.70, 348.72 and 149.20

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Solution

The fourth proportional to 252.70, 348.72 and 149.20 is: 205.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.70 : 348.72 = 149.20 : x
  2. Step 2: Convert to fraction form
    252.70/348.72 = 149.20/x
  3. Step 3: Cross multiply
    252.70x = 348.72 × 149.20
  4. Step 4: Simplify right side
    252.70x = 52,029.02
  5. Step 5: Solve for x
    x = 52,029.02/252.70
  6. Step 6: Final answer
    x = 205.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.