Home / 3,120.39-4,306.12-1,723.13

Finding the Fourth Proportional to 3,120.39, 4,306.12 and 1,723.13

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Solution

The fourth proportional to 3,120.39, 4,306.12 and 1,723.13 is: 2,377.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.39 : 4,306.12 = 1,723.13 : x
  2. Step 2: Convert to fraction form
    3,120.39/4,306.12 = 1,723.13/x
  3. Step 3: Cross multiply
    3,120.39x = 4,306.12 × 1,723.13
  4. Step 4: Simplify right side
    3,120.39x = 7,420,004.56
  5. Step 5: Solve for x
    x = 7,420,004.56/3,120.39
  6. Step 6: Final answer
    x = 2,377.91

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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.