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Finding the Fourth Proportional to 246.21, 339.70 and 171.55

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Solution

The fourth proportional to 246.21, 339.70 and 171.55 is: 236.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    246.21 : 339.70 = 171.55 : x
  2. Step 2: Convert to fraction form
    246.21/339.70 = 171.55/x
  3. Step 3: Cross multiply
    246.21x = 339.70 × 171.55
  4. Step 4: Simplify right side
    246.21x = 58,275.54
  5. Step 5: Solve for x
    x = 58,275.54/246.21
  6. Step 6: Final answer
    x = 236.69

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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.