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Finding the Fourth Proportional to 331.22, 457.14 and 248.19

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Solution

The fourth proportional to 331.22, 457.14 and 248.19 is: 342.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.22 : 457.14 = 248.19 : x
  2. Step 2: Convert to fraction form
    331.22/457.14 = 248.19/x
  3. Step 3: Cross multiply
    331.22x = 457.14 × 248.19
  4. Step 4: Simplify right side
    331.22x = 113,457.58
  5. Step 5: Solve for x
    x = 113,457.58/331.22
  6. Step 6: Final answer
    x = 342.55

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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.