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Finding the Fourth Proportional to 906.97, 1,250.16 and 611.72

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Solution

The fourth proportional to 906.97, 1,250.16 and 611.72 is: 843.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.97 : 1,250.16 = 611.72 : x
  2. Step 2: Convert to fraction form
    906.97/1,250.16 = 611.72/x
  3. Step 3: Cross multiply
    906.97x = 1,250.16 × 611.72
  4. Step 4: Simplify right side
    906.97x = 764,747.88
  5. Step 5: Solve for x
    x = 764,747.88/906.97
  6. Step 6: Final answer
    x = 843.19

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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.