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Finding the Fourth Proportional to 201.72, 302.64 and 187.81

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Solution

The fourth proportional to 201.72, 302.64 and 187.81 is: 281.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.72 : 302.64 = 187.81 : x
  2. Step 2: Convert to fraction form
    201.72/302.64 = 187.81/x
  3. Step 3: Cross multiply
    201.72x = 302.64 × 187.81
  4. Step 4: Simplify right side
    201.72x = 56,838.82
  5. Step 5: Solve for x
    x = 56,838.82/201.72
  6. Step 6: Final answer
    x = 281.77

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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.