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Finding the Fourth Proportional to 609.35, 912.31 and 551.69

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Solution

The fourth proportional to 609.35, 912.31 and 551.69 is: 825.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.35 : 912.31 = 551.69 : x
  2. Step 2: Convert to fraction form
    609.35/912.31 = 551.69/x
  3. Step 3: Cross multiply
    609.35x = 912.31 × 551.69
  4. Step 4: Simplify right side
    609.35x = 503,306.36
  5. Step 5: Solve for x
    x = 503,306.36/609.35
  6. Step 6: Final answer
    x = 825.97

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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.