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Finding the Fourth Proportional to 442.51, 663.80 and 134.44

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Solution

The fourth proportional to 442.51, 663.80 and 134.44 is: 201.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.51 : 663.80 = 134.44 : x
  2. Step 2: Convert to fraction form
    442.51/663.80 = 134.44/x
  3. Step 3: Cross multiply
    442.51x = 663.80 × 134.44
  4. Step 4: Simplify right side
    442.51x = 89,238.94
  5. Step 5: Solve for x
    x = 89,238.94/442.51
  6. Step 6: Final answer
    x = 201.67

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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.