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Finding the Fourth Proportional to 1,250.77, 1,726.17 and 691.30

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Solution

The fourth proportional to 1,250.77, 1,726.17 and 691.30 is: 954.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,250.77 : 1,726.17 = 691.30 : x
  2. Step 2: Convert to fraction form
    1,250.77/1,726.17 = 691.30/x
  3. Step 3: Cross multiply
    1,250.77x = 1,726.17 × 691.30
  4. Step 4: Simplify right side
    1,250.77x = 1,193,289.23
  5. Step 5: Solve for x
    x = 1,193,289.23/1,250.77
  6. Step 6: Final answer
    x = 954.05

Related Problems

Find fourth proportional to 625.38, 863.08 and 345.65
Half scale
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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.