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Finding the Fourth Proportional to 937.28, 1,293.42 and 517.64

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Solution

The fourth proportional to 937.28, 1,293.42 and 517.64 is: 714.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.28 : 1,293.42 = 517.64 : x
  2. Step 2: Convert to fraction form
    937.28/1,293.42 = 517.64/x
  3. Step 3: Cross multiply
    937.28x = 1,293.42 × 517.64
  4. Step 4: Simplify right side
    937.28x = 669,525.93
  5. Step 5: Solve for x
    x = 669,525.93/937.28
  6. Step 6: Final answer
    x = 714.33

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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.