Home / 3,115.10-4,299.12-2,327.78

Finding the Fourth Proportional to 3,115.10, 4,299.12 and 2,327.78

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Solution

The fourth proportional to 3,115.10, 4,299.12 and 2,327.78 is: 3,212.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.10 : 4,299.12 = 2,327.78 : x
  2. Step 2: Convert to fraction form
    3,115.10/4,299.12 = 2,327.78/x
  3. Step 3: Cross multiply
    3,115.10x = 4,299.12 × 2,327.78
  4. Step 4: Simplify right side
    3,115.10x = 10,007,405.55
  5. Step 5: Solve for x
    x = 10,007,405.55/3,115.10
  6. Step 6: Final answer
    x = 3,212.55

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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.