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Finding the Fourth Proportional to 203.26, 304.78 and 87.68

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Solution

The fourth proportional to 203.26, 304.78 and 87.68 is: 131.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.26 : 304.78 = 87.68 : x
  2. Step 2: Convert to fraction form
    203.26/304.78 = 87.68/x
  3. Step 3: Cross multiply
    203.26x = 304.78 × 87.68
  4. Step 4: Simplify right side
    203.26x = 26,723.11
  5. Step 5: Solve for x
    x = 26,723.11/203.26
  6. Step 6: Final answer
    x = 131.47

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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.