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Finding the Fourth Proportional to 208.04, 287.21 and 134.48

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Solution

The fourth proportional to 208.04, 287.21 and 134.48 is: 185.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    208.04 : 287.21 = 134.48 : x
  2. Step 2: Convert to fraction form
    208.04/287.21 = 134.48/x
  3. Step 3: Cross multiply
    208.04x = 287.21 × 134.48
  4. Step 4: Simplify right side
    208.04x = 38,625.06
  5. Step 5: Solve for x
    x = 38,625.06/208.04
  6. Step 6: Final answer
    x = 185.67

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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.