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Finding the Fourth Proportional to 429.96, 645.11 and 169.98

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Solution

The fourth proportional to 429.96, 645.11 and 169.98 is: 255.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    429.96 : 645.11 = 169.98 : x
  2. Step 2: Convert to fraction form
    429.96/645.11 = 169.98/x
  3. Step 3: Cross multiply
    429.96x = 645.11 × 169.98
  4. Step 4: Simplify right side
    429.96x = 109,655.80
  5. Step 5: Solve for x
    x = 109,655.80/429.96
  6. Step 6: Final answer
    x = 255.04

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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.