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Finding the Fourth Proportional to 605.47, 908.20 and 172.62

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Solution

The fourth proportional to 605.47, 908.20 and 172.62 is: 258.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.47 : 908.20 = 172.62 : x
  2. Step 2: Convert to fraction form
    605.47/908.20 = 172.62/x
  3. Step 3: Cross multiply
    605.47x = 908.20 × 172.62
  4. Step 4: Simplify right side
    605.47x = 156,772.62
  5. Step 5: Solve for x
    x = 156,772.62/605.47
  6. Step 6: Final answer
    x = 258.93

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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.