Home / 1,781.23-2,669.68-1,261.38

Finding the Fourth Proportional to 1,781.23, 2,669.68 and 1,261.38

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Solution

The fourth proportional to 1,781.23, 2,669.68 and 1,261.38 is: 1,890.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,781.23 : 2,669.68 = 1,261.38 : x
  2. Step 2: Convert to fraction form
    1,781.23/2,669.68 = 1,261.38/x
  3. Step 3: Cross multiply
    1,781.23x = 2,669.68 × 1,261.38
  4. Step 4: Simplify right side
    1,781.23x = 3,367,480.96
  5. Step 5: Solve for x
    x = 3,367,480.96/1,781.23
  6. Step 6: Final answer
    x = 1,890.54

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1.5x scale

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.