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Finding the Fourth Proportional to 820.98, 1,229.49 and 473.46

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Solution

The fourth proportional to 820.98, 1,229.49 and 473.46 is: 709.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    820.98 : 1,229.49 = 473.46 : x
  2. Step 2: Convert to fraction form
    820.98/1,229.49 = 473.46/x
  3. Step 3: Cross multiply
    820.98x = 1,229.49 × 473.46
  4. Step 4: Simplify right side
    820.98x = 582,114.34
  5. Step 5: Solve for x
    x = 582,114.34/820.98
  6. Step 6: Final answer
    x = 709.05

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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.