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Finding the Fourth Proportional to 245.25, 338.09 and 171.45

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Solution

The fourth proportional to 245.25, 338.09 and 171.45 is: 236.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.25 : 338.09 = 171.45 : x
  2. Step 2: Convert to fraction form
    245.25/338.09 = 171.45/x
  3. Step 3: Cross multiply
    245.25x = 338.09 × 171.45
  4. Step 4: Simplify right side
    245.25x = 57,964.67
  5. Step 5: Solve for x
    x = 57,964.67/245.25
  6. Step 6: Final answer
    x = 236.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.