Home / 1,103.20-1,651.56-815.92

Finding the Fourth Proportional to 1,103.20, 1,651.56 and 815.92

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Solution

The fourth proportional to 1,103.20, 1,651.56 and 815.92 is: 1,221.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,103.20 : 1,651.56 = 815.92 : x
  2. Step 2: Convert to fraction form
    1,103.20/1,651.56 = 815.92/x
  3. Step 3: Cross multiply
    1,103.20x = 1,651.56 × 815.92
  4. Step 4: Simplify right side
    1,103.20x = 1,347,540.84
  5. Step 5: Solve for x
    x = 1,347,540.84/1,103.20
  6. Step 6: Final answer
    x = 1,221.48

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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.