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Finding the Fourth Proportional to 231.46, 345.36 and 208.37

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Solution

The fourth proportional to 231.46, 345.36 and 208.37 is: 310.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.46 : 345.36 = 208.37 : x
  2. Step 2: Convert to fraction form
    231.46/345.36 = 208.37/x
  3. Step 3: Cross multiply
    231.46x = 345.36 × 208.37
  4. Step 4: Simplify right side
    231.46x = 71,964.31
  5. Step 5: Solve for x
    x = 71,964.31/231.46
  6. Step 6: Final answer
    x = 310.92

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.