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Finding the Fourth Proportional to 208.14, 287.10 and 149.95

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Solution

The fourth proportional to 208.14, 287.10 and 149.95 is: 206.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    208.14 : 287.10 = 149.95 : x
  2. Step 2: Convert to fraction form
    208.14/287.10 = 149.95/x
  3. Step 3: Cross multiply
    208.14x = 287.10 × 149.95
  4. Step 4: Simplify right side
    208.14x = 43,050.65
  5. Step 5: Solve for x
    x = 43,050.65/208.14
  6. Step 6: Final answer
    x = 206.84

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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.