Home / 1,149.39-1,721.25-660.96

Finding the Fourth Proportional to 1,149.39, 1,721.25 and 660.96

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Solution

The fourth proportional to 1,149.39, 1,721.25 and 660.96 is: 989.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,149.39 : 1,721.25 = 660.96 : x
  2. Step 2: Convert to fraction form
    1,149.39/1,721.25 = 660.96/x
  3. Step 3: Cross multiply
    1,149.39x = 1,721.25 × 660.96
  4. Step 4: Simplify right side
    1,149.39x = 1,137,677.40
  5. Step 5: Solve for x
    x = 1,137,677.40/1,149.39
  6. Step 6: Final answer
    x = 989.81

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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.