Home / 2,281.12-3,147.96-1,286.30

Finding the Fourth Proportional to 2,281.12, 3,147.96 and 1,286.30

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Solution

The fourth proportional to 2,281.12, 3,147.96 and 1,286.30 is: 1,775.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,281.12 : 3,147.96 = 1,286.30 : x
  2. Step 2: Convert to fraction form
    2,281.12/3,147.96 = 1,286.30/x
  3. Step 3: Cross multiply
    2,281.12x = 3,147.96 × 1,286.30
  4. Step 4: Simplify right side
    2,281.12x = 4,049,220.95
  5. Step 5: Solve for x
    x = 4,049,220.95/2,281.12
  6. Step 6: Final answer
    x = 1,775.10

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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.