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Finding the Fourth Proportional to 665.87, 998.84 and 203.67

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Solution

The fourth proportional to 665.87, 998.84 and 203.67 is: 305.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.87 : 998.84 = 203.67 : x
  2. Step 2: Convert to fraction form
    665.87/998.84 = 203.67/x
  3. Step 3: Cross multiply
    665.87x = 998.84 × 203.67
  4. Step 4: Simplify right side
    665.87x = 203,434.25
  5. Step 5: Solve for x
    x = 203,434.25/665.87
  6. Step 6: Final answer
    x = 305.52

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Double scale
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Similar ratio
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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.