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Finding the Fourth Proportional to 517.91, 714.74 and 331.25

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Solution

The fourth proportional to 517.91, 714.74 and 331.25 is: 457.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.91 : 714.74 = 331.25 : x
  2. Step 2: Convert to fraction form
    517.91/714.74 = 331.25/x
  3. Step 3: Cross multiply
    517.91x = 714.74 × 331.25
  4. Step 4: Simplify right side
    517.91x = 236,757.63
  5. Step 5: Solve for x
    x = 236,757.63/517.91
  6. Step 6: Final answer
    x = 457.14

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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.