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Finding the Fourth Proportional to 349.16, 481.70 and 231.20

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Solution

The fourth proportional to 349.16, 481.70 and 231.20 is: 318.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.16 : 481.70 = 231.20 : x
  2. Step 2: Convert to fraction form
    349.16/481.70 = 231.20/x
  3. Step 3: Cross multiply
    349.16x = 481.70 × 231.20
  4. Step 4: Simplify right side
    349.16x = 111,369.04
  5. Step 5: Solve for x
    x = 111,369.04/349.16
  6. Step 6: Final answer
    x = 318.96

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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.