Home / 4,080.20-6,120.30-1,306.90

Finding the Fourth Proportional to 4,080.20, 6,120.30 and 1,306.90

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Solution

The fourth proportional to 4,080.20, 6,120.30 and 1,306.90 is: 1,960.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,080.20 : 6,120.30 = 1,306.90 : x
  2. Step 2: Convert to fraction form
    4,080.20/6,120.30 = 1,306.90/x
  3. Step 3: Cross multiply
    4,080.20x = 6,120.30 × 1,306.90
  4. Step 4: Simplify right side
    4,080.20x = 7,998,589.47
  5. Step 5: Solve for x
    x = 7,998,589.47/4,080.20
  6. Step 6: Final answer
    x = 1,960.34

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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.