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Finding the Fourth Proportional to 609.20, 913.41 and 243.57

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Solution

The fourth proportional to 609.20, 913.41 and 243.57 is: 365.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.20 : 913.41 = 243.57 : x
  2. Step 2: Convert to fraction form
    609.20/913.41 = 243.57/x
  3. Step 3: Cross multiply
    609.20x = 913.41 × 243.57
  4. Step 4: Simplify right side
    609.20x = 222,479.27
  5. Step 5: Solve for x
    x = 222,479.27/609.20
  6. Step 6: Final answer
    x = 365.20

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1.5x scale

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.