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Finding the Fourth Proportional to 2,375.68, 3,563.20 and 815.68

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Solution

The fourth proportional to 2,375.68, 3,563.20 and 815.68 is: 1,223.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,375.68 : 3,563.20 = 815.68 : x
  2. Step 2: Convert to fraction form
    2,375.68/3,563.20 = 815.68/x
  3. Step 3: Cross multiply
    2,375.68x = 3,563.20 × 815.68
  4. Step 4: Simplify right side
    2,375.68x = 2,906,430.98
  5. Step 5: Solve for x
    x = 2,906,430.98/2,375.68
  6. Step 6: Final answer
    x = 1,223.41

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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.