Home / 2,891.10-3,990.39-1,712.70

Finding the Fourth Proportional to 2,891.10, 3,990.39 and 1,712.70

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Solution

The fourth proportional to 2,891.10, 3,990.39 and 1,712.70 is: 2,363.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,891.10 : 3,990.39 = 1,712.70 : x
  2. Step 2: Convert to fraction form
    2,891.10/3,990.39 = 1,712.70/x
  3. Step 3: Cross multiply
    2,891.10x = 3,990.39 × 1,712.70
  4. Step 4: Simplify right side
    2,891.10x = 6,834,340.95
  5. Step 5: Solve for x
    x = 6,834,340.95/2,891.10
  6. Step 6: Final answer
    x = 2,363.92

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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.