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Finding the Fourth Proportional to 486.05, 729.26 and 197.42

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Solution

The fourth proportional to 486.05, 729.26 and 197.42 is: 296.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.05 : 729.26 = 197.42 : x
  2. Step 2: Convert to fraction form
    486.05/729.26 = 197.42/x
  3. Step 3: Cross multiply
    486.05x = 729.26 × 197.42
  4. Step 4: Simplify right side
    486.05x = 143,969.52
  5. Step 5: Solve for x
    x = 143,969.52/486.05
  6. Step 6: Final answer
    x = 296.20

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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.