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Finding the Fourth Proportional to 609.05, 913.78 and 404.43

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Solution

The fourth proportional to 609.05, 913.78 and 404.43 is: 606.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.05 : 913.78 = 404.43 : x
  2. Step 2: Convert to fraction form
    609.05/913.78 = 404.43/x
  3. Step 3: Cross multiply
    609.05x = 913.78 × 404.43
  4. Step 4: Simplify right side
    609.05x = 369,557.12
  5. Step 5: Solve for x
    x = 369,557.12/609.05
  6. Step 6: Final answer
    x = 606.77

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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.