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Finding the Fourth Proportional to 615.20, 922.39 and 395.69

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Solution

The fourth proportional to 615.20, 922.39 and 395.69 is: 593.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.20 : 922.39 = 395.69 : x
  2. Step 2: Convert to fraction form
    615.20/922.39 = 395.69/x
  3. Step 3: Cross multiply
    615.20x = 922.39 × 395.69
  4. Step 4: Simplify right side
    615.20x = 364,974.90
  5. Step 5: Solve for x
    x = 364,974.90/615.20
  6. Step 6: Final answer
    x = 593.27

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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.