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Finding the Fourth Proportional to 248.01, 342.42 and 221.70

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Solution

The fourth proportional to 248.01, 342.42 and 221.70 is: 306.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.01 : 342.42 = 221.70 : x
  2. Step 2: Convert to fraction form
    248.01/342.42 = 221.70/x
  3. Step 3: Cross multiply
    248.01x = 342.42 × 221.70
  4. Step 4: Simplify right side
    248.01x = 75,913.66
  5. Step 5: Solve for x
    x = 75,913.66/248.01
  6. Step 6: Final answer
    x = 306.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.