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Finding the Fourth Proportional to 401.78, 603.02 and 196.50

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Solution

The fourth proportional to 401.78, 603.02 and 196.50 is: 294.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.78 : 603.02 = 196.50 : x
  2. Step 2: Convert to fraction form
    401.78/603.02 = 196.50/x
  3. Step 3: Cross multiply
    401.78x = 603.02 × 196.50
  4. Step 4: Simplify right side
    401.78x = 118,493.43
  5. Step 5: Solve for x
    x = 118,493.43/401.78
  6. Step 6: Final answer
    x = 294.92

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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.