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Finding the Fourth Proportional to 223.72, 333.51 and 220.21

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Solution

The fourth proportional to 223.72, 333.51 and 220.21 is: 328.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.72 : 333.51 = 220.21 : x
  2. Step 2: Convert to fraction form
    223.72/333.51 = 220.21/x
  3. Step 3: Cross multiply
    223.72x = 333.51 × 220.21
  4. Step 4: Simplify right side
    223.72x = 73,442.24
  5. Step 5: Solve for x
    x = 73,442.24/223.72
  6. Step 6: Final answer
    x = 328.28

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.