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Finding the Fourth Proportional to 906.92, 1,250.34 and 721.02

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Solution

The fourth proportional to 906.92, 1,250.34 and 721.02 is: 994.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.92 : 1,250.34 = 721.02 : x
  2. Step 2: Convert to fraction form
    906.92/1,250.34 = 721.02/x
  3. Step 3: Cross multiply
    906.92x = 1,250.34 × 721.02
  4. Step 4: Simplify right side
    906.92x = 901,520.15
  5. Step 5: Solve for x
    x = 901,520.15/906.92
  6. Step 6: Final answer
    x = 994.05

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Double scale
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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.