Home / 2,640.24-3,961.80-1,180.40

Finding the Fourth Proportional to 2,640.24, 3,961.80 and 1,180.40

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Solution

The fourth proportional to 2,640.24, 3,961.80 and 1,180.40 is: 1,771.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,640.24 : 3,961.80 = 1,180.40 : x
  2. Step 2: Convert to fraction form
    2,640.24/3,961.80 = 1,180.40/x
  3. Step 3: Cross multiply
    2,640.24x = 3,961.80 × 1,180.40
  4. Step 4: Simplify right side
    2,640.24x = 4,676,508.72
  5. Step 5: Solve for x
    x = 4,676,508.72/2,640.24
  6. Step 6: Final answer
    x = 1,771.24

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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.