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Finding the Fourth Proportional to 208.37, 287.40 and 171.46

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Solution

The fourth proportional to 208.37, 287.40 and 171.46 is: 236.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    208.37 : 287.40 = 171.46 : x
  2. Step 2: Convert to fraction form
    208.37/287.40 = 171.46/x
  3. Step 3: Cross multiply
    208.37x = 287.40 × 171.46
  4. Step 4: Simplify right side
    208.37x = 49,277.60
  5. Step 5: Solve for x
    x = 49,277.60/208.37
  6. Step 6: Final answer
    x = 236.49

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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.