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Finding the Fourth Proportional to 375.90, 564.03 and 221.91

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Solution

The fourth proportional to 375.90, 564.03 and 221.91 is: 332.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.90 : 564.03 = 221.91 : x
  2. Step 2: Convert to fraction form
    375.90/564.03 = 221.91/x
  3. Step 3: Cross multiply
    375.90x = 564.03 × 221.91
  4. Step 4: Simplify right side
    375.90x = 125,163.90
  5. Step 5: Solve for x
    x = 125,163.90/375.90
  6. Step 6: Final answer
    x = 332.97

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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.