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Finding the Fourth Proportional to 445.70, 668.52 and 253.73

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Solution

The fourth proportional to 445.70, 668.52 and 253.73 is: 380.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.70 : 668.52 = 253.73 : x
  2. Step 2: Convert to fraction form
    445.70/668.52 = 253.73/x
  3. Step 3: Cross multiply
    445.70x = 668.52 × 253.73
  4. Step 4: Simplify right side
    445.70x = 169,620.24
  5. Step 5: Solve for x
    x = 169,620.24/445.70
  6. Step 6: Final answer
    x = 380.57

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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.