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Finding the Fourth Proportional to 486.82, 729.99 and 178.66

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Solution

The fourth proportional to 486.82, 729.99 and 178.66 is: 267.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.82 : 729.99 = 178.66 : x
  2. Step 2: Convert to fraction form
    486.82/729.99 = 178.66/x
  3. Step 3: Cross multiply
    486.82x = 729.99 × 178.66
  4. Step 4: Simplify right side
    486.82x = 130,420.01
  5. Step 5: Solve for x
    x = 130,420.01/486.82
  6. Step 6: Final answer
    x = 267.90

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.