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Finding the Fourth Proportional to 406.24, 609.42 and 189.70

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Solution

The fourth proportional to 406.24, 609.42 and 189.70 is: 284.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.24 : 609.42 = 189.70 : x
  2. Step 2: Convert to fraction form
    406.24/609.42 = 189.70/x
  3. Step 3: Cross multiply
    406.24x = 609.42 × 189.70
  4. Step 4: Simplify right side
    406.24x = 115,606.97
  5. Step 5: Solve for x
    x = 115,606.97/406.24
  6. Step 6: Final answer
    x = 284.58

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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.