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Finding the Fourth Proportional to 251.37, 375.57 and 221.29

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Solution

The fourth proportional to 251.37, 375.57 and 221.29 is: 330.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.37 : 375.57 = 221.29 : x
  2. Step 2: Convert to fraction form
    251.37/375.57 = 221.29/x
  3. Step 3: Cross multiply
    251.37x = 375.57 × 221.29
  4. Step 4: Simplify right side
    251.37x = 83,108.95
  5. Step 5: Solve for x
    x = 83,108.95/251.37
  6. Step 6: Final answer
    x = 330.62

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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.