Home / 2,449.80-3,381.48-2,121.72

Finding the Fourth Proportional to 2,449.80, 3,381.48 and 2,121.72

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Solution

The fourth proportional to 2,449.80, 3,381.48 and 2,121.72 is: 2,928.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,449.80 : 3,381.48 = 2,121.72 : x
  2. Step 2: Convert to fraction form
    2,449.80/3,381.48 = 2,121.72/x
  3. Step 3: Cross multiply
    2,449.80x = 3,381.48 × 2,121.72
  4. Step 4: Simplify right side
    2,449.80x = 7,174,553.75
  5. Step 5: Solve for x
    x = 7,174,553.75/2,449.80
  6. Step 6: Final answer
    x = 2,928.63

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1.5x scale

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.