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Finding the Fourth Proportional to 278.11, 383.82 and 167.58

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Solution

The fourth proportional to 278.11, 383.82 and 167.58 is: 231.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.11 : 383.82 = 167.58 : x
  2. Step 2: Convert to fraction form
    278.11/383.82 = 167.58/x
  3. Step 3: Cross multiply
    278.11x = 383.82 × 167.58
  4. Step 4: Simplify right side
    278.11x = 64,320.56
  5. Step 5: Solve for x
    x = 64,320.56/278.11
  6. Step 6: Final answer
    x = 231.28

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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.