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Finding the Fourth Proportional to 665.89, 998.83 and 203.66

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Solution

The fourth proportional to 665.89, 998.83 and 203.66 is: 305.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.89 : 998.83 = 203.66 : x
  2. Step 2: Convert to fraction form
    665.89/998.83 = 203.66/x
  3. Step 3: Cross multiply
    665.89x = 998.83 × 203.66
  4. Step 4: Simplify right side
    665.89x = 203,424.09
  5. Step 5: Solve for x
    x = 203,424.09/665.89
  6. Step 6: Final answer
    x = 305.49

Related Problems

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Half scale
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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.