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Finding the Fourth Proportional to 445.70, 668.21 and 153.02

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Solution

The fourth proportional to 445.70, 668.21 and 153.02 is: 229.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.70 : 668.21 = 153.02 : x
  2. Step 2: Convert to fraction form
    445.70/668.21 = 153.02/x
  3. Step 3: Cross multiply
    445.70x = 668.21 × 153.02
  4. Step 4: Simplify right side
    445.70x = 102,245.39
  5. Step 5: Solve for x
    x = 102,245.39/445.70
  6. Step 6: Final answer
    x = 229.41

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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.