Home / 2,781.91-3,839.82-1,720.00

Finding the Fourth Proportional to 2,781.91, 3,839.82 and 1,720.00

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Solution

The fourth proportional to 2,781.91, 3,839.82 and 1,720.00 is: 2,374.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.91 : 3,839.82 = 1,720.00 : x
  2. Step 2: Convert to fraction form
    2,781.91/3,839.82 = 1,720.00/x
  3. Step 3: Cross multiply
    2,781.91x = 3,839.82 × 1,720.00
  4. Step 4: Simplify right side
    2,781.91x = 6,604,471.20
  5. Step 5: Solve for x
    x = 6,604,471.20/2,781.91
  6. Step 6: Final answer
    x = 2,374.08

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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.