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Finding the Fourth Proportional to 517.32, 713.85 and 330.87

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Solution

The fourth proportional to 517.32, 713.85 and 330.87 is: 456.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.32 : 713.85 = 330.87 : x
  2. Step 2: Convert to fraction form
    517.32/713.85 = 330.87/x
  3. Step 3: Cross multiply
    517.32x = 713.85 × 330.87
  4. Step 4: Simplify right side
    517.32x = 236,191.55
  5. Step 5: Solve for x
    x = 236,191.55/517.32
  6. Step 6: Final answer
    x = 456.57

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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.