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Finding the Fourth Proportional to 440.14, 660.40 and 196.72

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Solution

The fourth proportional to 440.14, 660.40 and 196.72 is: 295.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.14 : 660.40 = 196.72 : x
  2. Step 2: Convert to fraction form
    440.14/660.40 = 196.72/x
  3. Step 3: Cross multiply
    440.14x = 660.40 × 196.72
  4. Step 4: Simplify right side
    440.14x = 129,913.89
  5. Step 5: Solve for x
    x = 129,913.89/440.14
  6. Step 6: Final answer
    x = 295.16

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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.