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Finding the Fourth Proportional to 331.12, 457.23 and 206.99

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Solution

The fourth proportional to 331.12, 457.23 and 206.99 is: 285.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.12 : 457.23 = 206.99 : x
  2. Step 2: Convert to fraction form
    331.12/457.23 = 206.99/x
  3. Step 3: Cross multiply
    331.12x = 457.23 × 206.99
  4. Step 4: Simplify right side
    331.12x = 94,641.85
  5. Step 5: Solve for x
    x = 94,641.85/331.12
  6. Step 6: Final answer
    x = 285.83

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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.