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Finding the Fourth Proportional to 331.25, 457.11 and 191.35

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Solution

The fourth proportional to 331.25, 457.11 and 191.35 is: 264.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.25 : 457.11 = 191.35 : x
  2. Step 2: Convert to fraction form
    331.25/457.11 = 191.35/x
  3. Step 3: Cross multiply
    331.25x = 457.11 × 191.35
  4. Step 4: Simplify right side
    331.25x = 87,466.86
  5. Step 5: Solve for x
    x = 87,466.86/331.25
  6. Step 6: Final answer
    x = 264.05

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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.