Home / 2,781.40-4,168.92-1,318.48

Finding the Fourth Proportional to 2,781.40, 4,168.92 and 1,318.48

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Solution

The fourth proportional to 2,781.40, 4,168.92 and 1,318.48 is: 1,976.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.40 : 4,168.92 = 1,318.48 : x
  2. Step 2: Convert to fraction form
    2,781.40/4,168.92 = 1,318.48/x
  3. Step 3: Cross multiply
    2,781.40x = 4,168.92 × 1,318.48
  4. Step 4: Simplify right side
    2,781.40x = 5,496,637.64
  5. Step 5: Solve for x
    x = 5,496,637.64/2,781.40
  6. Step 6: Final answer
    x = 1,976.21

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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.