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Finding the Fourth Proportional to 517.51, 714.45 and 331.12

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Solution

The fourth proportional to 517.51, 714.45 and 331.12 is: 457.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.51 : 714.45 = 331.12 : x
  2. Step 2: Convert to fraction form
    517.51/714.45 = 331.12/x
  3. Step 3: Cross multiply
    517.51x = 714.45 × 331.12
  4. Step 4: Simplify right side
    517.51x = 236,568.68
  5. Step 5: Solve for x
    x = 236,568.68/517.51
  6. Step 6: Final answer
    x = 457.13

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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.