Home / 2,721.20-4,079.40-2,429.60

Finding the Fourth Proportional to 2,721.20, 4,079.40 and 2,429.60

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Solution

The fourth proportional to 2,721.20, 4,079.40 and 2,429.60 is: 3,642.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,721.20 : 4,079.40 = 2,429.60 : x
  2. Step 2: Convert to fraction form
    2,721.20/4,079.40 = 2,429.60/x
  3. Step 3: Cross multiply
    2,721.20x = 4,079.40 × 2,429.60
  4. Step 4: Simplify right side
    2,721.20x = 9,911,310.24
  5. Step 5: Solve for x
    x = 9,911,310.24/2,721.20
  6. Step 6: Final answer
    x = 3,642.26

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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.