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Finding the Fourth Proportional to 618.14, 926.80 and 329.78

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Solution

The fourth proportional to 618.14, 926.80 and 329.78 is: 494.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.14 : 926.80 = 329.78 : x
  2. Step 2: Convert to fraction form
    618.14/926.80 = 329.78/x
  3. Step 3: Cross multiply
    618.14x = 926.80 × 329.78
  4. Step 4: Simplify right side
    618.14x = 305,640.10
  5. Step 5: Solve for x
    x = 305,640.10/618.14
  6. Step 6: Final answer
    x = 494.45

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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.