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Finding the Fourth Proportional to 714.56, 1,072.17 and 252.66

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Solution

The fourth proportional to 714.56, 1,072.17 and 252.66 is: 379.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.56 : 1,072.17 = 252.66 : x
  2. Step 2: Convert to fraction form
    714.56/1,072.17 = 252.66/x
  3. Step 3: Cross multiply
    714.56x = 1,072.17 × 252.66
  4. Step 4: Simplify right side
    714.56x = 270,894.47
  5. Step 5: Solve for x
    x = 270,894.47/714.56
  6. Step 6: Final answer
    x = 379.11

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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.