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Finding the Fourth Proportional to 442.72, 663.78 and 154

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Solution

The fourth proportional to 442.72, 663.78 and 154 is: 230.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.72 : 663.78 = 154 : x
  2. Step 2: Convert to fraction form
    442.72/663.78 = 154/x
  3. Step 3: Cross multiply
    442.72x = 663.78 × 154
  4. Step 4: Simplify right side
    442.72x = 102,222.12
  5. Step 5: Solve for x
    x = 102,222.12/442.72
  6. Step 6: Final answer
    x = 230.90

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.