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Finding the Fourth Proportional to 445.72, 668.70 and 153.24

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Solution

The fourth proportional to 445.72, 668.70 and 153.24 is: 229.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.72 : 668.70 = 153.24 : x
  2. Step 2: Convert to fraction form
    445.72/668.70 = 153.24/x
  3. Step 3: Cross multiply
    445.72x = 668.70 × 153.24
  4. Step 4: Simplify right side
    445.72x = 102,471.59
  5. Step 5: Solve for x
    x = 102,471.59/445.72
  6. Step 6: Final answer
    x = 229.90

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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.