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Finding the Fourth Proportional to 488.35, 674.29 and 322.79

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Solution

The fourth proportional to 488.35, 674.29 and 322.79 is: 445.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.35 : 674.29 = 322.79 : x
  2. Step 2: Convert to fraction form
    488.35/674.29 = 322.79/x
  3. Step 3: Cross multiply
    488.35x = 674.29 × 322.79
  4. Step 4: Simplify right side
    488.35x = 217,650.70
  5. Step 5: Solve for x
    x = 217,650.70/488.35
  6. Step 6: Final answer
    x = 445.69

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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.