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Finding the Fourth Proportional to 296.70, 409.42 and 178.72

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Solution

The fourth proportional to 296.70, 409.42 and 178.72 is: 246.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.70 : 409.42 = 178.72 : x
  2. Step 2: Convert to fraction form
    296.70/409.42 = 178.72/x
  3. Step 3: Cross multiply
    296.70x = 409.42 × 178.72
  4. Step 4: Simplify right side
    296.70x = 73,171.54
  5. Step 5: Solve for x
    x = 73,171.54/296.70
  6. Step 6: Final answer
    x = 246.62

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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.