Home / 4,240.80-6,350.40-3,139.20

Finding the Fourth Proportional to 4,240.80, 6,350.40 and 3,139.20

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Solution

The fourth proportional to 4,240.80, 6,350.40 and 3,139.20 is: 4,700.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,240.80 : 6,350.40 = 3,139.20 : x
  2. Step 2: Convert to fraction form
    4,240.80/6,350.40 = 3,139.20/x
  3. Step 3: Cross multiply
    4,240.80x = 6,350.40 × 3,139.20
  4. Step 4: Simplify right side
    4,240.80x = 19,935,175.68
  5. Step 5: Solve for x
    x = 19,935,175.68/4,240.80
  6. Step 6: Final answer
    x = 4,700.81

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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.