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Finding the Fourth Proportional to 488.27, 673.57 and 311.29

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Solution

The fourth proportional to 488.27, 673.57 and 311.29 is: 429.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.27 : 673.57 = 311.29 : x
  2. Step 2: Convert to fraction form
    488.27/673.57 = 311.29/x
  3. Step 3: Cross multiply
    488.27x = 673.57 × 311.29
  4. Step 4: Simplify right side
    488.27x = 209,675.61
  5. Step 5: Solve for x
    x = 209,675.61/488.27
  6. Step 6: Final answer
    x = 429.43

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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.