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Finding the Fourth Proportional to 820.06, 1,229.19 and 576.52

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Solution

The fourth proportional to 820.06, 1,229.19 and 576.52 is: 864.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    820.06 : 1,229.19 = 576.52 : x
  2. Step 2: Convert to fraction form
    820.06/1,229.19 = 576.52/x
  3. Step 3: Cross multiply
    820.06x = 1,229.19 × 576.52
  4. Step 4: Simplify right side
    820.06x = 708,652.62
  5. Step 5: Solve for x
    x = 708,652.62/820.06
  6. Step 6: Final answer
    x = 864.15

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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.