Home / 1,223.34-1,689.39-1,047.66

Finding the Fourth Proportional to 1,223.34, 1,689.39 and 1,047.66

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Solution

The fourth proportional to 1,223.34, 1,689.39 and 1,047.66 is: 1,446.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,223.34 : 1,689.39 = 1,047.66 : x
  2. Step 2: Convert to fraction form
    1,223.34/1,689.39 = 1,047.66/x
  3. Step 3: Cross multiply
    1,223.34x = 1,689.39 × 1,047.66
  4. Step 4: Simplify right side
    1,223.34x = 1,769,906.33
  5. Step 5: Solve for x
    x = 1,769,906.33/1,223.34
  6. Step 6: Final answer
    x = 1,446.78

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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.