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Finding the Fourth Proportional to 937.92, 1,292.40 and 716.88

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Solution

The fourth proportional to 937.92, 1,292.40 and 716.88 is: 987.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.92 : 1,292.40 = 716.88 : x
  2. Step 2: Convert to fraction form
    937.92/1,292.40 = 716.88/x
  3. Step 3: Cross multiply
    937.92x = 1,292.40 × 716.88
  4. Step 4: Simplify right side
    937.92x = 926,495.71
  5. Step 5: Solve for x
    x = 926,495.71/937.92
  6. Step 6: Final answer
    x = 987.82

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1.5x scale

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.