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Finding the Fourth Proportional to 820.14, 1,229.67 and 496.14

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Solution

The fourth proportional to 820.14, 1,229.67 and 496.14 is: 743.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    820.14 : 1,229.67 = 496.14 : x
  2. Step 2: Convert to fraction form
    820.14/1,229.67 = 496.14/x
  3. Step 3: Cross multiply
    820.14x = 1,229.67 × 496.14
  4. Step 4: Simplify right side
    820.14x = 610,088.47
  5. Step 5: Solve for x
    x = 610,088.47/820.14
  6. Step 6: Final answer
    x = 743.88

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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.