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Finding the Fourth Proportional to 222.72, 332.00 and 221.01

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Solution

The fourth proportional to 222.72, 332.00 and 221.01 is: 329.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.72 : 332.00 = 221.01 : x
  2. Step 2: Convert to fraction form
    222.72/332.00 = 221.01/x
  3. Step 3: Cross multiply
    222.72x = 332.00 × 221.01
  4. Step 4: Simplify right side
    222.72x = 73,374.21
  5. Step 5: Solve for x
    x = 73,374.21/222.72
  6. Step 6: Final answer
    x = 329.45

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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.