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Finding the Fourth Proportional to 2,896.30, 4,343.92 and 815.81

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Solution

The fourth proportional to 2,896.30, 4,343.92 and 815.81 is: 1,223.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,896.30 : 4,343.92 = 815.81 : x
  2. Step 2: Convert to fraction form
    2,896.30/4,343.92 = 815.81/x
  3. Step 3: Cross multiply
    2,896.30x = 4,343.92 × 815.81
  4. Step 4: Simplify right side
    2,896.30x = 3,543,793.70
  5. Step 5: Solve for x
    x = 3,543,793.70/2,896.30
  6. Step 6: Final answer
    x = 1,223.56

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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.