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Finding the Fourth Proportional to 517.11, 713.17 and 423.85

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Solution

The fourth proportional to 517.11, 713.17 and 423.85 is: 584.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.11 : 713.17 = 423.85 : x
  2. Step 2: Convert to fraction form
    517.11/713.17 = 423.85/x
  3. Step 3: Cross multiply
    517.11x = 713.17 × 423.85
  4. Step 4: Simplify right side
    517.11x = 302,277.10
  5. Step 5: Solve for x
    x = 302,277.10/517.11
  6. Step 6: Final answer
    x = 584.55

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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.