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Finding the Fourth Proportional to 1,250.85, 1,726.28 and 691.41

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Solution

The fourth proportional to 1,250.85, 1,726.28 and 691.41 is: 954.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,250.85 : 1,726.28 = 691.41 : x
  2. Step 2: Convert to fraction form
    1,250.85/1,726.28 = 691.41/x
  3. Step 3: Cross multiply
    1,250.85x = 1,726.28 × 691.41
  4. Step 4: Simplify right side
    1,250.85x = 1,193,555.17
  5. Step 5: Solve for x
    x = 1,193,555.17/1,250.85
  6. Step 6: Final answer
    x = 954.20

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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.