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Finding the Fourth Proportional to 440.78, 660.94 and 235.29

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Solution

The fourth proportional to 440.78, 660.94 and 235.29 is: 352.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.78 : 660.94 = 235.29 : x
  2. Step 2: Convert to fraction form
    440.78/660.94 = 235.29/x
  3. Step 3: Cross multiply
    440.78x = 660.94 × 235.29
  4. Step 4: Simplify right side
    440.78x = 155,512.57
  5. Step 5: Solve for x
    x = 155,512.57/440.78
  6. Step 6: Final answer
    x = 352.81

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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.