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Finding the Fourth Proportional to 665.94, 998.91 and 449.67

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Solution

The fourth proportional to 665.94, 998.91 and 449.67 is: 674.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.94 : 998.91 = 449.67 : x
  2. Step 2: Convert to fraction form
    665.94/998.91 = 449.67/x
  3. Step 3: Cross multiply
    665.94x = 998.91 × 449.67
  4. Step 4: Simplify right side
    665.94x = 449,179.86
  5. Step 5: Solve for x
    x = 449,179.86/665.94
  6. Step 6: Final answer
    x = 674.51

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.