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Finding the Fourth Proportional to 235.36, 353.19 and 91.08

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Solution

The fourth proportional to 235.36, 353.19 and 91.08 is: 136.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.36 : 353.19 = 91.08 : x
  2. Step 2: Convert to fraction form
    235.36/353.19 = 91.08/x
  3. Step 3: Cross multiply
    235.36x = 353.19 × 91.08
  4. Step 4: Simplify right side
    235.36x = 32,168.55
  5. Step 5: Solve for x
    x = 32,168.55/235.36
  6. Step 6: Final answer
    x = 136.68

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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.