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Finding the Fourth Proportional to 3,191.25, 4,403.97 and 1,949.25

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Solution

The fourth proportional to 3,191.25, 4,403.97 and 1,949.25 is: 2,689.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,191.25 : 4,403.97 = 1,949.25 : x
  2. Step 2: Convert to fraction form
    3,191.25/4,403.97 = 1,949.25/x
  3. Step 3: Cross multiply
    3,191.25x = 4,403.97 × 1,949.25
  4. Step 4: Simplify right side
    3,191.25x = 8,584,438.52
  5. Step 5: Solve for x
    x = 8,584,438.52/3,191.25
  6. Step 6: Final answer
    x = 2,689.99

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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.