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Finding the Fourth Proportional to 331.53, 457.35 and 220.86

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Solution

The fourth proportional to 331.53, 457.35 and 220.86 is: 304.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.53 : 457.35 = 220.86 : x
  2. Step 2: Convert to fraction form
    331.53/457.35 = 220.86/x
  3. Step 3: Cross multiply
    331.53x = 457.35 × 220.86
  4. Step 4: Simplify right side
    331.53x = 101,009.49
  5. Step 5: Solve for x
    x = 101,009.49/331.53
  6. Step 6: Final answer
    x = 304.68

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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.