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Finding the Fourth Proportional to 1,726.54, 2,589.16 and 686.23

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Solution

The fourth proportional to 1,726.54, 2,589.16 and 686.23 is: 1,029.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,726.54 : 2,589.16 = 686.23 : x
  2. Step 2: Convert to fraction form
    1,726.54/2,589.16 = 686.23/x
  3. Step 3: Cross multiply
    1,726.54x = 2,589.16 × 686.23
  4. Step 4: Simplify right side
    1,726.54x = 1,776,759.27
  5. Step 5: Solve for x
    x = 1,776,759.27/1,726.54
  6. Step 6: Final answer
    x = 1,029.09

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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.