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Finding the Fourth Proportional to 208.68, 312.73 and 116.17

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Solution

The fourth proportional to 208.68, 312.73 and 116.17 is: 174.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    208.68 : 312.73 = 116.17 : x
  2. Step 2: Convert to fraction form
    208.68/312.73 = 116.17/x
  3. Step 3: Cross multiply
    208.68x = 312.73 × 116.17
  4. Step 4: Simplify right side
    208.68x = 36,329.84
  5. Step 5: Solve for x
    x = 36,329.84/208.68
  6. Step 6: Final answer
    x = 174.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.