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Finding the Fourth Proportional to 320.85, 481.66 and 251.65

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Solution

The fourth proportional to 320.85, 481.66 and 251.65 is: 377.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.85 : 481.66 = 251.65 : x
  2. Step 2: Convert to fraction form
    320.85/481.66 = 251.65/x
  3. Step 3: Cross multiply
    320.85x = 481.66 × 251.65
  4. Step 4: Simplify right side
    320.85x = 121,209.74
  5. Step 5: Solve for x
    x = 121,209.74/320.85
  6. Step 6: Final answer
    x = 377.78

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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.