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Finding the Fourth Proportional to 445.59, 667.86 and 171.40

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Solution

The fourth proportional to 445.59, 667.86 and 171.40 is: 256.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.59 : 667.86 = 171.40 : x
  2. Step 2: Convert to fraction form
    445.59/667.86 = 171.40/x
  3. Step 3: Cross multiply
    445.59x = 667.86 × 171.40
  4. Step 4: Simplify right side
    445.59x = 114,471.20
  5. Step 5: Solve for x
    x = 114,471.20/445.59
  6. Step 6: Final answer
    x = 256.90

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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.