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Finding the Fourth Proportional to 937.60, 1,292.88 and 671.92

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Solution

The fourth proportional to 937.60, 1,292.88 and 671.92 is: 926.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.60 : 1,292.88 = 671.92 : x
  2. Step 2: Convert to fraction form
    937.60/1,292.88 = 671.92/x
  3. Step 3: Cross multiply
    937.60x = 1,292.88 × 671.92
  4. Step 4: Simplify right side
    937.60x = 868,711.93
  5. Step 5: Solve for x
    x = 868,711.93/937.60
  6. Step 6: Final answer
    x = 926.53

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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.