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Finding the Fourth Proportional to 235.42, 351.40 and 218.52

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Solution

The fourth proportional to 235.42, 351.40 and 218.52 is: 326.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.42 : 351.40 = 218.52 : x
  2. Step 2: Convert to fraction form
    235.42/351.40 = 218.52/x
  3. Step 3: Cross multiply
    235.42x = 351.40 × 218.52
  4. Step 4: Simplify right side
    235.42x = 76,787.93
  5. Step 5: Solve for x
    x = 76,787.93/235.42
  6. Step 6: Final answer
    x = 326.17

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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.