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Finding the Fourth Proportional to 820.33, 1,227.76 and 674.53

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Solution

The fourth proportional to 820.33, 1,227.76 and 674.53 is: 1,009.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    820.33 : 1,227.76 = 674.53 : x
  2. Step 2: Convert to fraction form
    820.33/1,227.76 = 674.53/x
  3. Step 3: Cross multiply
    820.33x = 1,227.76 × 674.53
  4. Step 4: Simplify right side
    820.33x = 828,156.20
  5. Step 5: Solve for x
    x = 828,156.20/820.33
  6. Step 6: Final answer
    x = 1,009.54

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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.