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Finding the Fourth Proportional to 320.00, 441.18 and 209.43

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Solution

The fourth proportional to 320.00, 441.18 and 209.43 is: 288.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.00 : 441.18 = 209.43 : x
  2. Step 2: Convert to fraction form
    320.00/441.18 = 209.43/x
  3. Step 3: Cross multiply
    320.00x = 441.18 × 209.43
  4. Step 4: Simplify right side
    320.00x = 92,396.33
  5. Step 5: Solve for x
    x = 92,396.33/320.00
  6. Step 6: Final answer
    x = 288.74

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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.