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Finding the Fourth Proportional to 329.65, 494.23 and 278.62

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Solution

The fourth proportional to 329.65, 494.23 and 278.62 is: 417.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.65 : 494.23 = 278.62 : x
  2. Step 2: Convert to fraction form
    329.65/494.23 = 278.62/x
  3. Step 3: Cross multiply
    329.65x = 494.23 × 278.62
  4. Step 4: Simplify right side
    329.65x = 137,702.36
  5. Step 5: Solve for x
    x = 137,702.36/329.65
  6. Step 6: Final answer
    x = 417.72

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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.