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Finding the Fourth Proportional to 306.59, 423.14 and 196.11

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Solution

The fourth proportional to 306.59, 423.14 and 196.11 is: 270.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.59 : 423.14 = 196.11 : x
  2. Step 2: Convert to fraction form
    306.59/423.14 = 196.11/x
  3. Step 3: Cross multiply
    306.59x = 423.14 × 196.11
  4. Step 4: Simplify right side
    306.59x = 82,981.00
  5. Step 5: Solve for x
    x = 82,981.00/306.59
  6. Step 6: Final answer
    x = 270.66

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.