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Finding the Fourth Proportional to 517.40, 713.96 and 296.36

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Solution

The fourth proportional to 517.40, 713.96 and 296.36 is: 408.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.40 : 713.96 = 296.36 : x
  2. Step 2: Convert to fraction form
    517.40/713.96 = 296.36/x
  3. Step 3: Cross multiply
    517.40x = 713.96 × 296.36
  4. Step 4: Simplify right side
    517.40x = 211,589.19
  5. Step 5: Solve for x
    x = 211,589.19/517.40
  6. Step 6: Final answer
    x = 408.95

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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.