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Finding the Fourth Proportional to 665.56, 997.12 and 336.12

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Solution

The fourth proportional to 665.56, 997.12 and 336.12 is: 503.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.56 : 997.12 = 336.12 : x
  2. Step 2: Convert to fraction form
    665.56/997.12 = 336.12/x
  3. Step 3: Cross multiply
    665.56x = 997.12 × 336.12
  4. Step 4: Simplify right side
    665.56x = 335,151.97
  5. Step 5: Solve for x
    x = 335,151.97/665.56
  6. Step 6: Final answer
    x = 503.56

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Double scale
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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.