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Finding the Fourth Proportional to 488.80, 674.82 and 322.96

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Solution

The fourth proportional to 488.80, 674.82 and 322.96 is: 445.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.80 : 674.82 = 322.96 : x
  2. Step 2: Convert to fraction form
    488.80/674.82 = 322.96/x
  3. Step 3: Cross multiply
    488.80x = 674.82 × 322.96
  4. Step 4: Simplify right side
    488.80x = 217,939.87
  5. Step 5: Solve for x
    x = 217,939.87/488.80
  6. Step 6: Final answer
    x = 445.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.