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Finding the Fourth Proportional to 245.66, 338.65 and 171.74

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Solution

The fourth proportional to 245.66, 338.65 and 171.74 is: 236.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.66 : 338.65 = 171.74 : x
  2. Step 2: Convert to fraction form
    245.66/338.65 = 171.74/x
  3. Step 3: Cross multiply
    245.66x = 338.65 × 171.74
  4. Step 4: Simplify right side
    245.66x = 58,160.17
  5. Step 5: Solve for x
    x = 58,160.17/245.66
  6. Step 6: Final answer
    x = 236.76

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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.