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Finding the Fourth Proportional to 331.03, 457.05 and 248.32

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Solution

The fourth proportional to 331.03, 457.05 and 248.32 is: 342.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.03 : 457.05 = 248.32 : x
  2. Step 2: Convert to fraction form
    331.03/457.05 = 248.32/x
  3. Step 3: Cross multiply
    331.03x = 457.05 × 248.32
  4. Step 4: Simplify right side
    331.03x = 113,494.66
  5. Step 5: Solve for x
    x = 113,494.66/331.03
  6. Step 6: Final answer
    x = 342.85

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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.