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Finding the Fourth Proportional to 252.56, 347.82 and 215.72

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Solution

The fourth proportional to 252.56, 347.82 and 215.72 is: 297.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.56 : 347.82 = 215.72 : x
  2. Step 2: Convert to fraction form
    252.56/347.82 = 215.72/x
  3. Step 3: Cross multiply
    252.56x = 347.82 × 215.72
  4. Step 4: Simplify right side
    252.56x = 75,031.73
  5. Step 5: Solve for x
    x = 75,031.73/252.56
  6. Step 6: Final answer
    x = 297.08

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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.