Home / 1,426.38-2,139.57-876.90

Finding the Fourth Proportional to 1,426.38, 2,139.57 and 876.90

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Solution

The fourth proportional to 1,426.38, 2,139.57 and 876.90 is: 1,315.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.38 : 2,139.57 = 876.90 : x
  2. Step 2: Convert to fraction form
    1,426.38/2,139.57 = 876.90/x
  3. Step 3: Cross multiply
    1,426.38x = 2,139.57 × 876.90
  4. Step 4: Simplify right side
    1,426.38x = 1,876,188.93
  5. Step 5: Solve for x
    x = 1,876,188.93/1,426.38
  6. Step 6: Final answer
    x = 1,315.35

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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.