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Finding the Fourth Proportional to 235.18, 352.79 and 72.86

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Solution

The fourth proportional to 235.18, 352.79 and 72.86 is: 109.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.18 : 352.79 = 72.86 : x
  2. Step 2: Convert to fraction form
    235.18/352.79 = 72.86/x
  3. Step 3: Cross multiply
    235.18x = 352.79 × 72.86
  4. Step 4: Simplify right side
    235.18x = 25,703.75
  5. Step 5: Solve for x
    x = 25,703.75/235.18
  6. Step 6: Final answer
    x = 109.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.