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Finding the Fourth Proportional to 406.90, 610.42 and 163.39

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Solution

The fourth proportional to 406.90, 610.42 and 163.39 is: 245.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.90 : 610.42 = 163.39 : x
  2. Step 2: Convert to fraction form
    406.90/610.42 = 163.39/x
  3. Step 3: Cross multiply
    406.90x = 610.42 × 163.39
  4. Step 4: Simplify right side
    406.90x = 99,734.59
  5. Step 5: Solve for x
    x = 99,734.59/406.90
  6. Step 6: Final answer
    x = 245.11

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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.