Home / 1,231.28-1,841.85-1,123.14

Finding the Fourth Proportional to 1,231.28, 1,841.85 and 1,123.14

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Solution

The fourth proportional to 1,231.28, 1,841.85 and 1,123.14 is: 1,680.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.28 : 1,841.85 = 1,123.14 : x
  2. Step 2: Convert to fraction form
    1,231.28/1,841.85 = 1,123.14/x
  3. Step 3: Cross multiply
    1,231.28x = 1,841.85 × 1,123.14
  4. Step 4: Simplify right side
    1,231.28x = 2,068,655.41
  5. Step 5: Solve for x
    x = 2,068,655.41/1,231.28
  6. Step 6: Final answer
    x = 1,680.09

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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.