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Finding the Fourth Proportional to 609.89, 914.29 and 280.49

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Solution

The fourth proportional to 609.89, 914.29 and 280.49 is: 420.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.89 : 914.29 = 280.49 : x
  2. Step 2: Convert to fraction form
    609.89/914.29 = 280.49/x
  3. Step 3: Cross multiply
    609.89x = 914.29 × 280.49
  4. Step 4: Simplify right side
    609.89x = 256,449.20
  5. Step 5: Solve for x
    x = 256,449.20/609.89
  6. Step 6: Final answer
    x = 420.48

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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.