Home / 1,101.92-1,645.32-939.52

Finding the Fourth Proportional to 1,101.92, 1,645.32 and 939.52

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Solution

The fourth proportional to 1,101.92, 1,645.32 and 939.52 is: 1,402.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.92 : 1,645.32 = 939.52 : x
  2. Step 2: Convert to fraction form
    1,101.92/1,645.32 = 939.52/x
  3. Step 3: Cross multiply
    1,101.92x = 1,645.32 × 939.52
  4. Step 4: Simplify right side
    1,101.92x = 1,545,811.05
  5. Step 5: Solve for x
    x = 1,545,811.05/1,101.92
  6. Step 6: Final answer
    x = 1,402.83

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.