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Finding the Fourth Proportional to 615.21, 921.99 and 224.85

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Solution

The fourth proportional to 615.21, 921.99 and 224.85 is: 336.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.21 : 921.99 = 224.85 : x
  2. Step 2: Convert to fraction form
    615.21/921.99 = 224.85/x
  3. Step 3: Cross multiply
    615.21x = 921.99 × 224.85
  4. Step 4: Simplify right side
    615.21x = 207,304.84
  5. Step 5: Solve for x
    x = 207,304.84/615.21
  6. Step 6: Final answer
    x = 336.97

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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.