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Finding the Fourth Proportional to 406.09, 609.74 and 201.36

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Solution

The fourth proportional to 406.09, 609.74 and 201.36 is: 302.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.09 : 609.74 = 201.36 : x
  2. Step 2: Convert to fraction form
    406.09/609.74 = 201.36/x
  3. Step 3: Cross multiply
    406.09x = 609.74 × 201.36
  4. Step 4: Simplify right side
    406.09x = 122,777.25
  5. Step 5: Solve for x
    x = 122,777.25/406.09
  6. Step 6: Final answer
    x = 302.34

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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.