Home / 3,972-5,480.46-2,399.78

Finding the Fourth Proportional to 3,972, 5,480.46 and 2,399.78

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Solution

The fourth proportional to 3,972, 5,480.46 and 2,399.78 is: 3,311.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,972 : 5,480.46 = 2,399.78 : x
  2. Step 2: Convert to fraction form
    3,972/5,480.46 = 2,399.78/x
  3. Step 3: Cross multiply
    3,972x = 5,480.46 × 2,399.78
  4. Step 4: Simplify right side
    3,972x = 13,151,898.30
  5. Step 5: Solve for x
    x = 13,151,898.30/3,972
  6. Step 6: Final answer
    x = 3,311.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.