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Finding the Fourth Proportional to 517.54, 713.96 and 307.60

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Solution

The fourth proportional to 517.54, 713.96 and 307.60 is: 424.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.54 : 713.96 = 307.60 : x
  2. Step 2: Convert to fraction form
    517.54/713.96 = 307.60/x
  3. Step 3: Cross multiply
    517.54x = 713.96 × 307.60
  4. Step 4: Simplify right side
    517.54x = 219,613.66
  5. Step 5: Solve for x
    x = 219,613.66/517.54
  6. Step 6: Final answer
    x = 424.34

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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.