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Finding the Fourth Proportional to 235.52, 351.55 and 218.60

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Solution

The fourth proportional to 235.52, 351.55 and 218.60 is: 326.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.52 : 351.55 = 218.60 : x
  2. Step 2: Convert to fraction form
    235.52/351.55 = 218.60/x
  3. Step 3: Cross multiply
    235.52x = 351.55 × 218.60
  4. Step 4: Simplify right side
    235.52x = 76,848.83
  5. Step 5: Solve for x
    x = 76,848.83/235.52
  6. Step 6: Final answer
    x = 326.29

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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.