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Finding the Fourth Proportional to 252.47, 347.67 and 215.61

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Solution

The fourth proportional to 252.47, 347.67 and 215.61 is: 296.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.47 : 347.67 = 215.61 : x
  2. Step 2: Convert to fraction form
    252.47/347.67 = 215.61/x
  3. Step 3: Cross multiply
    252.47x = 347.67 × 215.61
  4. Step 4: Simplify right side
    252.47x = 74,961.13
  5. Step 5: Solve for x
    x = 74,961.13/252.47
  6. Step 6: Final answer
    x = 296.91

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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.