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Finding the Fourth Proportional to 208.66, 288.01 and 134.97

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Solution

The fourth proportional to 208.66, 288.01 and 134.97 is: 186.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    208.66 : 288.01 = 134.97 : x
  2. Step 2: Convert to fraction form
    208.66/288.01 = 134.97/x
  3. Step 3: Cross multiply
    208.66x = 288.01 × 134.97
  4. Step 4: Simplify right side
    208.66x = 38,872.71
  5. Step 5: Solve for x
    x = 38,872.71/208.66
  6. Step 6: Final answer
    x = 186.30

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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.