Home / 1,291.11-1,789.24-1,266.49

Finding the Fourth Proportional to 1,291.11, 1,789.24 and 1,266.49

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Solution

The fourth proportional to 1,291.11, 1,789.24 and 1,266.49 is: 1,755.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291.11 : 1,789.24 = 1,266.49 : x
  2. Step 2: Convert to fraction form
    1,291.11/1,789.24 = 1,266.49/x
  3. Step 3: Cross multiply
    1,291.11x = 1,789.24 × 1,266.49
  4. Step 4: Simplify right side
    1,291.11x = 2,266,054.57
  5. Step 5: Solve for x
    x = 2,266,054.57/1,291.11
  6. Step 6: Final answer
    x = 1,755.12

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.