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Finding the Fourth Proportional to 208.76, 287.70 and 150.44

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Solution

The fourth proportional to 208.76, 287.70 and 150.44 is: 207.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    208.76 : 287.70 = 150.44 : x
  2. Step 2: Convert to fraction form
    208.76/287.70 = 150.44/x
  3. Step 3: Cross multiply
    208.76x = 287.70 × 150.44
  4. Step 4: Simplify right side
    208.76x = 43,281.59
  5. Step 5: Solve for x
    x = 43,281.59/208.76
  6. Step 6: Final answer
    x = 207.33

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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.