Home / 3,107.57-4,287.18-1,988.25

Finding the Fourth Proportional to 3,107.57, 4,287.18 and 1,988.25

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Solution

The fourth proportional to 3,107.57, 4,287.18 and 1,988.25 is: 2,742.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.57 : 4,287.18 = 1,988.25 : x
  2. Step 2: Convert to fraction form
    3,107.57/4,287.18 = 1,988.25/x
  3. Step 3: Cross multiply
    3,107.57x = 4,287.18 × 1,988.25
  4. Step 4: Simplify right side
    3,107.57x = 8,523,965.83
  5. Step 5: Solve for x
    x = 8,523,965.83/3,107.57
  6. Step 6: Final answer
    x = 2,742.97

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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.