Home / 1,781.27-2,455.22-1,191.59

Finding the Fourth Proportional to 1,781.27, 2,455.22 and 1,191.59

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Solution

The fourth proportional to 1,781.27, 2,455.22 and 1,191.59 is: 1,642.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,781.27 : 2,455.22 = 1,191.59 : x
  2. Step 2: Convert to fraction form
    1,781.27/2,455.22 = 1,191.59/x
  3. Step 3: Cross multiply
    1,781.27x = 2,455.22 × 1,191.59
  4. Step 4: Simplify right side
    1,781.27x = 2,925,609.64
  5. Step 5: Solve for x
    x = 2,925,609.64/1,781.27
  6. Step 6: Final answer
    x = 1,642.43

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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.