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Finding the Fourth Proportional to 1,251.25, 1,726.08 and 779.07

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Solution

The fourth proportional to 1,251.25, 1,726.08 and 779.07 is: 1,074.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,251.25 : 1,726.08 = 779.07 : x
  2. Step 2: Convert to fraction form
    1,251.25/1,726.08 = 779.07/x
  3. Step 3: Cross multiply
    1,251.25x = 1,726.08 × 779.07
  4. Step 4: Simplify right side
    1,251.25x = 1,344,740.70
  5. Step 5: Solve for x
    x = 1,344,740.70/1,251.25
  6. Step 6: Final answer
    x = 1,074.72

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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.