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Finding the Fourth Proportional to 609.05, 909.29 and 551.64

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Solution

The fourth proportional to 609.05, 909.29 and 551.64 is: 823.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.05 : 909.29 = 551.64 : x
  2. Step 2: Convert to fraction form
    609.05/909.29 = 551.64/x
  3. Step 3: Cross multiply
    609.05x = 909.29 × 551.64
  4. Step 4: Simplify right side
    609.05x = 501,605.52
  5. Step 5: Solve for x
    x = 501,605.52/609.05
  6. Step 6: Final answer
    x = 823.58

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.