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Finding the Fourth Proportional to 320.52, 441.99 and 209.88

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Solution

The fourth proportional to 320.52, 441.99 and 209.88 is: 289.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.52 : 441.99 = 209.88 : x
  2. Step 2: Convert to fraction form
    320.52/441.99 = 209.88/x
  3. Step 3: Cross multiply
    320.52x = 441.99 × 209.88
  4. Step 4: Simplify right side
    320.52x = 92,764.86
  5. Step 5: Solve for x
    x = 92,764.86/320.52
  6. Step 6: Final answer
    x = 289.42

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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.