Home / 2,871.40-4,309.15-1,229.12

Finding the Fourth Proportional to 2,871.40, 4,309.15 and 1,229.12

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Solution

The fourth proportional to 2,871.40, 4,309.15 and 1,229.12 is: 1,844.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,871.40 : 4,309.15 = 1,229.12 : x
  2. Step 2: Convert to fraction form
    2,871.40/4,309.15 = 1,229.12/x
  3. Step 3: Cross multiply
    2,871.40x = 4,309.15 × 1,229.12
  4. Step 4: Simplify right side
    2,871.40x = 5,296,480.53
  5. Step 5: Solve for x
    x = 5,296,480.53/2,871.40
  6. Step 6: Final answer
    x = 1,844.56

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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.