Home / 1,240.38-1,857.83-1,125.56

Finding the Fourth Proportional to 1,240.38, 1,857.83 and 1,125.56

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Solution

The fourth proportional to 1,240.38, 1,857.83 and 1,125.56 is: 1,685.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240.38 : 1,857.83 = 1,125.56 : x
  2. Step 2: Convert to fraction form
    1,240.38/1,857.83 = 1,125.56/x
  3. Step 3: Cross multiply
    1,240.38x = 1,857.83 × 1,125.56
  4. Step 4: Simplify right side
    1,240.38x = 2,091,099.13
  5. Step 5: Solve for x
    x = 2,091,099.13/1,240.38
  6. Step 6: Final answer
    x = 1,685.85

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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.