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Finding the Fourth Proportional to 233.42, 321.18 and 208.92

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Solution

The fourth proportional to 233.42, 321.18 and 208.92 is: 287.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    233.42 : 321.18 = 208.92 : x
  2. Step 2: Convert to fraction form
    233.42/321.18 = 208.92/x
  3. Step 3: Cross multiply
    233.42x = 321.18 × 208.92
  4. Step 4: Simplify right side
    233.42x = 67,100.93
  5. Step 5: Solve for x
    x = 67,100.93/233.42
  6. Step 6: Final answer
    x = 287.47

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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.