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Finding the Fourth Proportional to 819.32, 1,225.62 and 682.56

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Solution

The fourth proportional to 819.32, 1,225.62 and 682.56 is: 1,021.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    819.32 : 1,225.62 = 682.56 : x
  2. Step 2: Convert to fraction form
    819.32/1,225.62 = 682.56/x
  3. Step 3: Cross multiply
    819.32x = 1,225.62 × 682.56
  4. Step 4: Simplify right side
    819.32x = 836,559.19
  5. Step 5: Solve for x
    x = 836,559.19/819.32
  6. Step 6: Final answer
    x = 1,021.04

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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.