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Finding the Fourth Proportional to 2,722.65, 4,077.90 and 2,661.90

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Solution

The fourth proportional to 2,722.65, 4,077.90 and 2,661.90 is: 3,986.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,722.65 : 4,077.90 = 2,661.90 : x
  2. Step 2: Convert to fraction form
    2,722.65/4,077.90 = 2,661.90/x
  3. Step 3: Cross multiply
    2,722.65x = 4,077.90 × 2,661.90
  4. Step 4: Simplify right side
    2,722.65x = 10,854,962.01
  5. Step 5: Solve for x
    x = 10,854,962.01/2,722.65
  6. Step 6: Final answer
    x = 3,986.91

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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.