Home / 1,243.26-1,712.75-869.58

Finding the Fourth Proportional to 1,243.26, 1,712.75 and 869.58

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Solution

The fourth proportional to 1,243.26, 1,712.75 and 869.58 is: 1,197.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243.26 : 1,712.75 = 869.58 : x
  2. Step 2: Convert to fraction form
    1,243.26/1,712.75 = 869.58/x
  3. Step 3: Cross multiply
    1,243.26x = 1,712.75 × 869.58
  4. Step 4: Simplify right side
    1,243.26x = 1,489,373.15
  5. Step 5: Solve for x
    x = 1,489,373.15/1,243.26
  6. Step 6: Final answer
    x = 1,197.96

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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.