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Finding the Fourth Proportional to 331.06, 457.05 and 220.69

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Solution

The fourth proportional to 331.06, 457.05 and 220.69 is: 304.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.06 : 457.05 = 220.69 : x
  2. Step 2: Convert to fraction form
    331.06/457.05 = 220.69/x
  3. Step 3: Cross multiply
    331.06x = 457.05 × 220.69
  4. Step 4: Simplify right side
    331.06x = 100,864.08
  5. Step 5: Solve for x
    x = 100,864.08/331.06
  6. Step 6: Final answer
    x = 304.67

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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.