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Finding the Fourth Proportional to 223.10, 333.70 and 217.21

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Solution

The fourth proportional to 223.10, 333.70 and 217.21 is: 324.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.10 : 333.70 = 217.21 : x
  2. Step 2: Convert to fraction form
    223.10/333.70 = 217.21/x
  3. Step 3: Cross multiply
    223.10x = 333.70 × 217.21
  4. Step 4: Simplify right side
    223.10x = 72,482.98
  5. Step 5: Solve for x
    x = 72,482.98/223.10
  6. Step 6: Final answer
    x = 324.89

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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.