Home / 2,987.27-4,122.51-1,728.43

Finding the Fourth Proportional to 2,987.27, 4,122.51 and 1,728.43

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Solution

The fourth proportional to 2,987.27, 4,122.51 and 1,728.43 is: 2,385.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.27 : 4,122.51 = 1,728.43 : x
  2. Step 2: Convert to fraction form
    2,987.27/4,122.51 = 1,728.43/x
  3. Step 3: Cross multiply
    2,987.27x = 4,122.51 × 1,728.43
  4. Step 4: Simplify right side
    2,987.27x = 7,125,469.96
  5. Step 5: Solve for x
    x = 7,125,469.96/2,987.27
  6. Step 6: Final answer
    x = 2,385.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.