Home / 1,318.38-1,979.62-1,259.96

Finding the Fourth Proportional to 1,318.38, 1,979.62 and 1,259.96

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Solution

The fourth proportional to 1,318.38, 1,979.62 and 1,259.96 is: 1,891.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.38 : 1,979.62 = 1,259.96 : x
  2. Step 2: Convert to fraction form
    1,318.38/1,979.62 = 1,259.96/x
  3. Step 3: Cross multiply
    1,318.38x = 1,979.62 × 1,259.96
  4. Step 4: Simplify right side
    1,318.38x = 2,494,242.02
  5. Step 5: Solve for x
    x = 2,494,242.02/1,318.38
  6. Step 6: Final answer
    x = 1,891.90

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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.