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Finding the Fourth Proportional to 406.39, 609.07 and 189.49

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Solution

The fourth proportional to 406.39, 609.07 and 189.49 is: 283.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.39 : 609.07 = 189.49 : x
  2. Step 2: Convert to fraction form
    406.39/609.07 = 189.49/x
  3. Step 3: Cross multiply
    406.39x = 609.07 × 189.49
  4. Step 4: Simplify right side
    406.39x = 115,412.20
  5. Step 5: Solve for x
    x = 115,412.20/406.39
  6. Step 6: Final answer
    x = 283.99

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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.