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Finding the Fourth Proportional to 223.28, 335.08 and 209.84

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Solution

The fourth proportional to 223.28, 335.08 and 209.84 is: 314.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.28 : 335.08 = 209.84 : x
  2. Step 2: Convert to fraction form
    223.28/335.08 = 209.84/x
  3. Step 3: Cross multiply
    223.28x = 335.08 × 209.84
  4. Step 4: Simplify right side
    223.28x = 70,313.19
  5. Step 5: Solve for x
    x = 70,313.19/223.28
  6. Step 6: Final answer
    x = 314.91

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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.