Home / 3,920.20-5,876.65-1,321.31

Finding the Fourth Proportional to 3,920.20, 5,876.65 and 1,321.31

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Solution

The fourth proportional to 3,920.20, 5,876.65 and 1,321.31 is: 1,980.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.20 : 5,876.65 = 1,321.31 : x
  2. Step 2: Convert to fraction form
    3,920.20/5,876.65 = 1,321.31/x
  3. Step 3: Cross multiply
    3,920.20x = 5,876.65 × 1,321.31
  4. Step 4: Simplify right side
    3,920.20x = 7,764,892.75
  5. Step 5: Solve for x
    x = 7,764,892.75/3,920.20
  6. Step 6: Final answer
    x = 1,980.74

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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.