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Finding the Fourth Proportional to 281.82, 388.91 and 165.38

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Solution

The fourth proportional to 281.82, 388.91 and 165.38 is: 228.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.82 : 388.91 = 165.38 : x
  2. Step 2: Convert to fraction form
    281.82/388.91 = 165.38/x
  3. Step 3: Cross multiply
    281.82x = 388.91 × 165.38
  4. Step 4: Simplify right side
    281.82x = 64,316.40
  5. Step 5: Solve for x
    x = 64,316.40/281.82
  6. Step 6: Final answer
    x = 228.22

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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.