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Finding the Fourth Proportional to 295.80, 408.21 and 171.45

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Solution

The fourth proportional to 295.80, 408.21 and 171.45 is: 236.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    295.80 : 408.21 = 171.45 : x
  2. Step 2: Convert to fraction form
    295.80/408.21 = 171.45/x
  3. Step 3: Cross multiply
    295.80x = 408.21 × 171.45
  4. Step 4: Simplify right side
    295.80x = 69,987.60
  5. Step 5: Solve for x
    x = 69,987.60/295.80
  6. Step 6: Final answer
    x = 236.60

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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.