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Finding the Fourth Proportional to 937.92, 1,291.12 and 771.84

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Solution

The fourth proportional to 937.92, 1,291.12 and 771.84 is: 1,062.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.92 : 1,291.12 = 771.84 : x
  2. Step 2: Convert to fraction form
    937.92/1,291.12 = 771.84/x
  3. Step 3: Cross multiply
    937.92x = 1,291.12 × 771.84
  4. Step 4: Simplify right side
    937.92x = 996,538.06
  5. Step 5: Solve for x
    x = 996,538.06/937.92
  6. Step 6: Final answer
    x = 1,062.50

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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.