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Finding the Fourth Proportional to 266.87, 368.08 and 178.21

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Solution

The fourth proportional to 266.87, 368.08 and 178.21 is: 245.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.87 : 368.08 = 178.21 : x
  2. Step 2: Convert to fraction form
    266.87/368.08 = 178.21/x
  3. Step 3: Cross multiply
    266.87x = 368.08 × 178.21
  4. Step 4: Simplify right side
    266.87x = 65,595.55
  5. Step 5: Solve for x
    x = 65,595.55/266.87
  6. Step 6: Final answer
    x = 245.79

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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.