Home / 3,917.67-5,872.80-1,318.78

Finding the Fourth Proportional to 3,917.67, 5,872.80 and 1,318.78

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Solution

The fourth proportional to 3,917.67, 5,872.80 and 1,318.78 is: 1,976.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.67 : 5,872.80 = 1,318.78 : x
  2. Step 2: Convert to fraction form
    3,917.67/5,872.80 = 1,318.78/x
  3. Step 3: Cross multiply
    3,917.67x = 5,872.80 × 1,318.78
  4. Step 4: Simplify right side
    3,917.67x = 7,744,943.47
  5. Step 5: Solve for x
    x = 7,744,943.47/3,917.67
  6. Step 6: Final answer
    x = 1,976.93

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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.