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Finding the Fourth Proportional to 665.67, 998.81 and 300.26

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Solution

The fourth proportional to 665.67, 998.81 and 300.26 is: 450.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.67 : 998.81 = 300.26 : x
  2. Step 2: Convert to fraction form
    665.67/998.81 = 300.26/x
  3. Step 3: Cross multiply
    665.67x = 998.81 × 300.26
  4. Step 4: Simplify right side
    665.67x = 299,896.20
  5. Step 5: Solve for x
    x = 299,896.20/665.67
  6. Step 6: Final answer
    x = 450.52

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Double scale
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Similar ratio
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1.5x scale

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.