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Finding the Fourth Proportional to 665.96, 998.91 and 178.98

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Solution

The fourth proportional to 665.96, 998.91 and 178.98 is: 268.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.96 : 998.91 = 178.98 : x
  2. Step 2: Convert to fraction form
    665.96/998.91 = 178.98/x
  3. Step 3: Cross multiply
    665.96x = 998.91 × 178.98
  4. Step 4: Simplify right side
    665.96x = 178,784.91
  5. Step 5: Solve for x
    x = 178,784.91/665.96
  6. Step 6: Final answer
    x = 268.46

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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.