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Finding the Fourth Proportional to 235.45, 353.25 and 73.15

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Solution

The fourth proportional to 235.45, 353.25 and 73.15 is: 109.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.45 : 353.25 = 73.15 : x
  2. Step 2: Convert to fraction form
    235.45/353.25 = 73.15/x
  3. Step 3: Cross multiply
    235.45x = 353.25 × 73.15
  4. Step 4: Simplify right side
    235.45x = 25,839.35
  5. Step 5: Solve for x
    x = 25,839.35/235.45
  6. Step 6: Final answer
    x = 109.74

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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.