Home / 3,872.78-5,343.66-2,279.51

Finding the Fourth Proportional to 3,872.78, 5,343.66 and 2,279.51

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Solution

The fourth proportional to 3,872.78, 5,343.66 and 2,279.51 is: 3,145.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,872.78 : 5,343.66 = 2,279.51 : x
  2. Step 2: Convert to fraction form
    3,872.78/5,343.66 = 2,279.51/x
  3. Step 3: Cross multiply
    3,872.78x = 5,343.66 × 2,279.51
  4. Step 4: Simplify right side
    3,872.78x = 12,180,899.69
  5. Step 5: Solve for x
    x = 12,180,899.69/3,872.78
  6. Step 6: Final answer
    x = 3,145.26

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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.