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Finding the Fourth Proportional to 1,766.40, 2,649.52 and 726.15

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Solution

The fourth proportional to 1,766.40, 2,649.52 and 726.15 is: 1,089.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,766.40 : 2,649.52 = 726.15 : x
  2. Step 2: Convert to fraction form
    1,766.40/2,649.52 = 726.15/x
  3. Step 3: Cross multiply
    1,766.40x = 2,649.52 × 726.15
  4. Step 4: Simplify right side
    1,766.40x = 1,923,947.13
  5. Step 5: Solve for x
    x = 1,923,947.13/1,766.40
  6. Step 6: Final answer
    x = 1,089.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.