Home / 2,791.20-3,851.92-1,549.20

Finding the Fourth Proportional to 2,791.20, 3,851.92 and 1,549.20

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Solution

The fourth proportional to 2,791.20, 3,851.92 and 1,549.20 is: 2,137.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,791.20 : 3,851.92 = 1,549.20 : x
  2. Step 2: Convert to fraction form
    2,791.20/3,851.92 = 1,549.20/x
  3. Step 3: Cross multiply
    2,791.20x = 3,851.92 × 1,549.20
  4. Step 4: Simplify right side
    2,791.20x = 5,967,394.46
  5. Step 5: Solve for x
    x = 5,967,394.46/2,791.20
  6. Step 6: Final answer
    x = 2,137.93

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1.5x scale

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.