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Finding the Fourth Proportional to 445.80, 667.62 and 253.56

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Solution

The fourth proportional to 445.80, 667.62 and 253.56 is: 379.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.80 : 667.62 = 253.56 : x
  2. Step 2: Convert to fraction form
    445.80/667.62 = 253.56/x
  3. Step 3: Cross multiply
    445.80x = 667.62 × 253.56
  4. Step 4: Simplify right side
    445.80x = 169,281.73
  5. Step 5: Solve for x
    x = 169,281.73/445.80
  6. Step 6: Final answer
    x = 379.73

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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.