Home / 1,330.28-1,833.96-1,121.30

Finding the Fourth Proportional to 1,330.28, 1,833.96 and 1,121.30

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Solution

The fourth proportional to 1,330.28, 1,833.96 and 1,121.30 is: 1,545.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.28 : 1,833.96 = 1,121.30 : x
  2. Step 2: Convert to fraction form
    1,330.28/1,833.96 = 1,121.30/x
  3. Step 3: Cross multiply
    1,330.28x = 1,833.96 × 1,121.30
  4. Step 4: Simplify right side
    1,330.28x = 2,056,419.35
  5. Step 5: Solve for x
    x = 2,056,419.35/1,330.28
  6. Step 6: Final answer
    x = 1,545.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.