Home / 3,917.80-5,876.66-1,320.72

Finding the Fourth Proportional to 3,917.80, 5,876.66 and 1,320.72

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Solution

The fourth proportional to 3,917.80, 5,876.66 and 1,320.72 is: 1,981.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.80 : 5,876.66 = 1,320.72 : x
  2. Step 2: Convert to fraction form
    3,917.80/5,876.66 = 1,320.72/x
  3. Step 3: Cross multiply
    3,917.80x = 5,876.66 × 1,320.72
  4. Step 4: Simplify right side
    3,917.80x = 7,761,422.40
  5. Step 5: Solve for x
    x = 7,761,422.40/3,917.80
  6. Step 6: Final answer
    x = 1,981.07

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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.