Home / 3,120.13-4,679.68-1,039.65

Finding the Fourth Proportional to 3,120.13, 4,679.68 and 1,039.65

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Solution

The fourth proportional to 3,120.13, 4,679.68 and 1,039.65 is: 1,559.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.13 : 4,679.68 = 1,039.65 : x
  2. Step 2: Convert to fraction form
    3,120.13/4,679.68 = 1,039.65/x
  3. Step 3: Cross multiply
    3,120.13x = 4,679.68 × 1,039.65
  4. Step 4: Simplify right side
    3,120.13x = 4,865,229.31
  5. Step 5: Solve for x
    x = 4,865,229.31/3,120.13
  6. Step 6: Final answer
    x = 1,559.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.