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Finding the Fourth Proportional to 331.91, 456.93 and 248.91

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Solution

The fourth proportional to 331.91, 456.93 and 248.91 is: 342.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.91 : 456.93 = 248.91 : x
  2. Step 2: Convert to fraction form
    331.91/456.93 = 248.91/x
  3. Step 3: Cross multiply
    331.91x = 456.93 × 248.91
  4. Step 4: Simplify right side
    331.91x = 113,734.45
  5. Step 5: Solve for x
    x = 113,734.45/331.91
  6. Step 6: Final answer
    x = 342.67

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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.