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Finding the Fourth Proportional to 665.89, 998.60 and 227.05

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Solution

The fourth proportional to 665.89, 998.60 and 227.05 is: 340.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.89 : 998.60 = 227.05 : x
  2. Step 2: Convert to fraction form
    665.89/998.60 = 227.05/x
  3. Step 3: Cross multiply
    665.89x = 998.60 × 227.05
  4. Step 4: Simplify right side
    665.89x = 226,734.12
  5. Step 5: Solve for x
    x = 226,734.12/665.89
  6. Step 6: Final answer
    x = 340.50

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.