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Finding the Fourth Proportional to 302.91, 454.38 and 231.21

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Solution

The fourth proportional to 302.91, 454.38 and 231.21 is: 346.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.91 : 454.38 = 231.21 : x
  2. Step 2: Convert to fraction form
    302.91/454.38 = 231.21/x
  3. Step 3: Cross multiply
    302.91x = 454.38 × 231.21
  4. Step 4: Simplify right side
    302.91x = 105,057.20
  5. Step 5: Solve for x
    x = 105,057.20/302.91
  6. Step 6: Final answer
    x = 346.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.