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Finding the Fourth Proportional to 248.79, 374.56 and 220.06

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Solution

The fourth proportional to 248.79, 374.56 and 220.06 is: 331.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.79 : 374.56 = 220.06 : x
  2. Step 2: Convert to fraction form
    248.79/374.56 = 220.06/x
  3. Step 3: Cross multiply
    248.79x = 374.56 × 220.06
  4. Step 4: Simplify right side
    248.79x = 82,425.67
  5. Step 5: Solve for x
    x = 82,425.67/248.79
  6. Step 6: Final answer
    x = 331.31

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.