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Finding the Fourth Proportional to 609.44, 913.96 and 280.16

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Solution

The fourth proportional to 609.44, 913.96 and 280.16 is: 420.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.44 : 913.96 = 280.16 : x
  2. Step 2: Convert to fraction form
    609.44/913.96 = 280.16/x
  3. Step 3: Cross multiply
    609.44x = 913.96 × 280.16
  4. Step 4: Simplify right side
    609.44x = 256,055.03
  5. Step 5: Solve for x
    x = 256,055.03/609.44
  6. Step 6: Final answer
    x = 420.15

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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.