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Finding the Fourth Proportional to 609.20, 913.20 and 362.12

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Solution

The fourth proportional to 609.20, 913.20 and 362.12 is: 542.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.20 : 913.20 = 362.12 : x
  2. Step 2: Convert to fraction form
    609.20/913.20 = 362.12/x
  3. Step 3: Cross multiply
    609.20x = 913.20 × 362.12
  4. Step 4: Simplify right side
    609.20x = 330,687.98
  5. Step 5: Solve for x
    x = 330,687.98/609.20
  6. Step 6: Final answer
    x = 542.82

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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.