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Finding the Fourth Proportional to 245.29, 367.95 and 91.18

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Solution

The fourth proportional to 245.29, 367.95 and 91.18 is: 136.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.29 : 367.95 = 91.18 : x
  2. Step 2: Convert to fraction form
    245.29/367.95 = 91.18/x
  3. Step 3: Cross multiply
    245.29x = 367.95 × 91.18
  4. Step 4: Simplify right side
    245.29x = 33,550.82
  5. Step 5: Solve for x
    x = 33,550.82/245.29
  6. Step 6: Final answer
    x = 136.78

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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.