Home / 1,726.30-2,588.73-686.11

Finding the Fourth Proportional to 1,726.30, 2,588.73 and 686.11

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Solution

The fourth proportional to 1,726.30, 2,588.73 and 686.11 is: 1,028.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,726.30 : 2,588.73 = 686.11 : x
  2. Step 2: Convert to fraction form
    1,726.30/2,588.73 = 686.11/x
  3. Step 3: Cross multiply
    1,726.30x = 2,588.73 × 686.11
  4. Step 4: Simplify right side
    1,726.30x = 1,776,153.54
  5. Step 5: Solve for x
    x = 1,776,153.54/1,726.30
  6. Step 6: Final answer
    x = 1,028.88

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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.