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Finding the Fourth Proportional to 406.86, 609.99 and 187.63

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Solution

The fourth proportional to 406.86, 609.99 and 187.63 is: 281.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.86 : 609.99 = 187.63 : x
  2. Step 2: Convert to fraction form
    406.86/609.99 = 187.63/x
  3. Step 3: Cross multiply
    406.86x = 609.99 × 187.63
  4. Step 4: Simplify right side
    406.86x = 114,450.20
  5. Step 5: Solve for x
    x = 114,450.20/406.86
  6. Step 6: Final answer
    x = 281.30

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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.