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Finding the Fourth Proportional to 615.96, 922.26 and 442.80

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Solution

The fourth proportional to 615.96, 922.26 and 442.80 is: 662.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.96 : 922.26 = 442.80 : x
  2. Step 2: Convert to fraction form
    615.96/922.26 = 442.80/x
  3. Step 3: Cross multiply
    615.96x = 922.26 × 442.80
  4. Step 4: Simplify right side
    615.96x = 408,376.73
  5. Step 5: Solve for x
    x = 408,376.73/615.96
  6. Step 6: Final answer
    x = 662.99

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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.