Home / 2,485.31-3,728.13-819.55

Finding the Fourth Proportional to 2,485.31, 3,728.13 and 819.55

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Solution

The fourth proportional to 2,485.31, 3,728.13 and 819.55 is: 1,229.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,485.31 : 3,728.13 = 819.55 : x
  2. Step 2: Convert to fraction form
    2,485.31/3,728.13 = 819.55/x
  3. Step 3: Cross multiply
    2,485.31x = 3,728.13 × 819.55
  4. Step 4: Simplify right side
    2,485.31x = 3,055,366.20
  5. Step 5: Solve for x
    x = 3,055,366.20/2,485.31
  6. Step 6: Final answer
    x = 1,229.37

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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.