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Finding the Fourth Proportional to 517.30, 713.89 and 281.26

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Solution

The fourth proportional to 517.30, 713.89 and 281.26 is: 388.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.30 : 713.89 = 281.26 : x
  2. Step 2: Convert to fraction form
    517.30/713.89 = 281.26/x
  3. Step 3: Cross multiply
    517.30x = 713.89 × 281.26
  4. Step 4: Simplify right side
    517.30x = 200,791.47
  5. Step 5: Solve for x
    x = 200,791.47/517.30
  6. Step 6: Final answer
    x = 388.15

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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.