Home / 3,434.20-5,149.38-1,381.72

Finding the Fourth Proportional to 3,434.20, 5,149.38 and 1,381.72

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Solution

The fourth proportional to 3,434.20, 5,149.38 and 1,381.72 is: 2,071.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,434.20 : 5,149.38 = 1,381.72 : x
  2. Step 2: Convert to fraction form
    3,434.20/5,149.38 = 1,381.72/x
  3. Step 3: Cross multiply
    3,434.20x = 5,149.38 × 1,381.72
  4. Step 4: Simplify right side
    3,434.20x = 7,115,001.33
  5. Step 5: Solve for x
    x = 7,115,001.33/3,434.20
  6. Step 6: Final answer
    x = 2,071.81

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1.5x scale

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.