Home / 3,145.11-4,340.27-1,728.82

Finding the Fourth Proportional to 3,145.11, 4,340.27 and 1,728.82

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Solution

The fourth proportional to 3,145.11, 4,340.27 and 1,728.82 is: 2,385.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.11 : 4,340.27 = 1,728.82 : x
  2. Step 2: Convert to fraction form
    3,145.11/4,340.27 = 1,728.82/x
  3. Step 3: Cross multiply
    3,145.11x = 4,340.27 × 1,728.82
  4. Step 4: Simplify right side
    3,145.11x = 7,503,545.58
  5. Step 5: Solve for x
    x = 7,503,545.58/3,145.11
  6. Step 6: Final answer
    x = 2,385.78

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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.