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Finding the Fourth Proportional to 821.46, 1,232.18 and 334.52

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Solution

The fourth proportional to 821.46, 1,232.18 and 334.52 is: 501.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    821.46 : 1,232.18 = 334.52 : x
  2. Step 2: Convert to fraction form
    821.46/1,232.18 = 334.52/x
  3. Step 3: Cross multiply
    821.46x = 1,232.18 × 334.52
  4. Step 4: Simplify right side
    821.46x = 412,188.85
  5. Step 5: Solve for x
    x = 412,188.85/821.46
  6. Step 6: Final answer
    x = 501.78

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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.