Home / 1,781.43-2,666.95-1,189.11

Finding the Fourth Proportional to 1,781.43, 2,666.95 and 1,189.11

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Solution

The fourth proportional to 1,781.43, 2,666.95 and 1,189.11 is: 1,780.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,781.43 : 2,666.95 = 1,189.11 : x
  2. Step 2: Convert to fraction form
    1,781.43/2,666.95 = 1,189.11/x
  3. Step 3: Cross multiply
    1,781.43x = 2,666.95 × 1,189.11
  4. Step 4: Simplify right side
    1,781.43x = 3,171,296.91
  5. Step 5: Solve for x
    x = 3,171,296.91/1,781.43
  6. Step 6: Final answer
    x = 1,780.20

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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.