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Finding the Fourth Proportional to 906.92, 1,250.56 and 718.30

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Solution

The fourth proportional to 906.92, 1,250.56 and 718.30 is: 990.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.92 : 1,250.56 = 718.30 : x
  2. Step 2: Convert to fraction form
    906.92/1,250.56 = 718.30/x
  3. Step 3: Cross multiply
    906.92x = 1,250.56 × 718.30
  4. Step 4: Simplify right side
    906.92x = 898,277.25
  5. Step 5: Solve for x
    x = 898,277.25/906.92
  6. Step 6: Final answer
    x = 990.47

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Double scale
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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.