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Finding the Fourth Proportional to 906.46, 1,251.21 and 611.62

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Solution

The fourth proportional to 906.46, 1,251.21 and 611.62 is: 844.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.46 : 1,251.21 = 611.62 : x
  2. Step 2: Convert to fraction form
    906.46/1,251.21 = 611.62/x
  3. Step 3: Cross multiply
    906.46x = 1,251.21 × 611.62
  4. Step 4: Simplify right side
    906.46x = 765,265.06
  5. Step 5: Solve for x
    x = 765,265.06/906.46
  6. Step 6: Final answer
    x = 844.23

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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.