Home / 3,851.46-5,315.10-2,279.58

Finding the Fourth Proportional to 3,851.46, 5,315.10 and 2,279.58

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Solution

The fourth proportional to 3,851.46, 5,315.10 and 2,279.58 is: 3,145.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,851.46 : 5,315.10 = 2,279.58 : x
  2. Step 2: Convert to fraction form
    3,851.46/5,315.10 = 2,279.58/x
  3. Step 3: Cross multiply
    3,851.46x = 5,315.10 × 2,279.58
  4. Step 4: Simplify right side
    3,851.46x = 12,116,195.66
  5. Step 5: Solve for x
    x = 12,116,195.66/3,851.46
  6. Step 6: Final answer
    x = 3,145.87

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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.