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Finding the Fourth Proportional to 615.55, 923.49 and 323.20

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Solution

The fourth proportional to 615.55, 923.49 and 323.20 is: 484.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.55 : 923.49 = 323.20 : x
  2. Step 2: Convert to fraction form
    615.55/923.49 = 323.20/x
  3. Step 3: Cross multiply
    615.55x = 923.49 × 323.20
  4. Step 4: Simplify right side
    615.55x = 298,471.97
  5. Step 5: Solve for x
    x = 298,471.97/615.55
  6. Step 6: Final answer
    x = 484.89

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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.