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Finding the Fourth Proportional to 490.93, 677.52 and 281.17

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Solution

The fourth proportional to 490.93, 677.52 and 281.17 is: 388.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.93 : 677.52 = 281.17 : x
  2. Step 2: Convert to fraction form
    490.93/677.52 = 281.17/x
  3. Step 3: Cross multiply
    490.93x = 677.52 × 281.17
  4. Step 4: Simplify right side
    490.93x = 190,499.15
  5. Step 5: Solve for x
    x = 190,499.15/490.93
  6. Step 6: Final answer
    x = 388.04

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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.