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Finding the Fourth Proportional to 404.50, 606.72 and 115.94

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Solution

The fourth proportional to 404.50, 606.72 and 115.94 is: 173.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.50 : 606.72 = 115.94 : x
  2. Step 2: Convert to fraction form
    404.50/606.72 = 115.94/x
  3. Step 3: Cross multiply
    404.50x = 606.72 × 115.94
  4. Step 4: Simplify right side
    404.50x = 70,343.12
  5. Step 5: Solve for x
    x = 70,343.12/404.50
  6. Step 6: Final answer
    x = 173.90

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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.