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Finding the Fourth Proportional to 404.13, 605.79 and 172.92

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Solution

The fourth proportional to 404.13, 605.79 and 172.92 is: 259.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.13 : 605.79 = 172.92 : x
  2. Step 2: Convert to fraction form
    404.13/605.79 = 172.92/x
  3. Step 3: Cross multiply
    404.13x = 605.79 × 172.92
  4. Step 4: Simplify right side
    404.13x = 104,753.21
  5. Step 5: Solve for x
    x = 104,753.21/404.13
  6. Step 6: Final answer
    x = 259.21

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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.