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Finding the Fourth Proportional to 609.03, 840.40 and 343.38

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Solution

The fourth proportional to 609.03, 840.40 and 343.38 is: 473.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.03 : 840.40 = 343.38 : x
  2. Step 2: Convert to fraction form
    609.03/840.40 = 343.38/x
  3. Step 3: Cross multiply
    609.03x = 840.40 × 343.38
  4. Step 4: Simplify right side
    609.03x = 288,578.85
  5. Step 5: Solve for x
    x = 288,578.85/609.03
  6. Step 6: Final answer
    x = 473.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.