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Finding the Fourth Proportional to 490.61, 677.16 and 324.83

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Solution

The fourth proportional to 490.61, 677.16 and 324.83 is: 448.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.61 : 677.16 = 324.83 : x
  2. Step 2: Convert to fraction form
    490.61/677.16 = 324.83/x
  3. Step 3: Cross multiply
    490.61x = 677.16 × 324.83
  4. Step 4: Simplify right side
    490.61x = 219,963.58
  5. Step 5: Solve for x
    x = 219,963.58/490.61
  6. Step 6: Final answer
    x = 448.34

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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.