Home / 1,781.11-2,456.53-1,661.75

Finding the Fourth Proportional to 1,781.11, 2,456.53 and 1,661.75

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Solution

The fourth proportional to 1,781.11, 2,456.53 and 1,661.75 is: 2,291.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,781.11 : 2,456.53 = 1,661.75 : x
  2. Step 2: Convert to fraction form
    1,781.11/2,456.53 = 1,661.75/x
  3. Step 3: Cross multiply
    1,781.11x = 2,456.53 × 1,661.75
  4. Step 4: Simplify right side
    1,781.11x = 4,082,122.29
  5. Step 5: Solve for x
    x = 4,082,122.29/1,781.11
  6. Step 6: Final answer
    x = 2,291.90

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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.