Home / 3,168.15-4,371.35-1,988.79

Finding the Fourth Proportional to 3,168.15, 4,371.35 and 1,988.79

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Solution

The fourth proportional to 3,168.15, 4,371.35 and 1,988.79 is: 2,744.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,168.15 : 4,371.35 = 1,988.79 : x
  2. Step 2: Convert to fraction form
    3,168.15/4,371.35 = 1,988.79/x
  3. Step 3: Cross multiply
    3,168.15x = 4,371.35 × 1,988.79
  4. Step 4: Simplify right side
    3,168.15x = 8,693,687.22
  5. Step 5: Solve for x
    x = 8,693,687.22/3,168.15
  6. Step 6: Final answer
    x = 2,744.09

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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.