Home / 1,228.92-1,839.26-1,127.76

Finding the Fourth Proportional to 1,228.92, 1,839.26 and 1,127.76

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Solution

The fourth proportional to 1,228.92, 1,839.26 and 1,127.76 is: 1,687.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,228.92 : 1,839.26 = 1,127.76 : x
  2. Step 2: Convert to fraction form
    1,228.92/1,839.26 = 1,127.76/x
  3. Step 3: Cross multiply
    1,228.92x = 1,839.26 × 1,127.76
  4. Step 4: Simplify right side
    1,228.92x = 2,074,243.86
  5. Step 5: Solve for x
    x = 2,074,243.86/1,228.92
  6. Step 6: Final answer
    x = 1,687.86

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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.