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Finding the Fourth Proportional to 609.31, 914.18 and 192.91

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Solution

The fourth proportional to 609.31, 914.18 and 192.91 is: 289.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.31 : 914.18 = 192.91 : x
  2. Step 2: Convert to fraction form
    609.31/914.18 = 192.91/x
  3. Step 3: Cross multiply
    609.31x = 914.18 × 192.91
  4. Step 4: Simplify right side
    609.31x = 176,348.93
  5. Step 5: Solve for x
    x = 176,348.93/609.31
  6. Step 6: Final answer
    x = 289.42

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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.