Home / 2,821.20-3,892.38-1,642.04

Finding the Fourth Proportional to 2,821.20, 3,892.38 and 1,642.04

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Solution

The fourth proportional to 2,821.20, 3,892.38 and 1,642.04 is: 2,265.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,821.20 : 3,892.38 = 1,642.04 : x
  2. Step 2: Convert to fraction form
    2,821.20/3,892.38 = 1,642.04/x
  3. Step 3: Cross multiply
    2,821.20x = 3,892.38 × 1,642.04
  4. Step 4: Simplify right side
    2,821.20x = 6,391,443.66
  5. Step 5: Solve for x
    x = 6,391,443.66/2,821.20
  6. Step 6: Final answer
    x = 2,265.51

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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.