Home / 2,961.80-4,439.59-2,139.70

Finding the Fourth Proportional to 2,961.80, 4,439.59 and 2,139.70

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Solution

The fourth proportional to 2,961.80, 4,439.59 and 2,139.70 is: 3,207.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,961.80 : 4,439.59 = 2,139.70 : x
  2. Step 2: Convert to fraction form
    2,961.80/4,439.59 = 2,139.70/x
  3. Step 3: Cross multiply
    2,961.80x = 4,439.59 × 2,139.70
  4. Step 4: Simplify right side
    2,961.80x = 9,499,390.72
  5. Step 5: Solve for x
    x = 9,499,390.72/2,961.80
  6. Step 6: Final answer
    x = 3,207.30

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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.