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Finding the Fourth Proportional to 446.39, 668.20 and 248.45

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Solution

The fourth proportional to 446.39, 668.20 and 248.45 is: 371.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.39 : 668.20 = 248.45 : x
  2. Step 2: Convert to fraction form
    446.39/668.20 = 248.45/x
  3. Step 3: Cross multiply
    446.39x = 668.20 × 248.45
  4. Step 4: Simplify right side
    446.39x = 166,014.29
  5. Step 5: Solve for x
    x = 166,014.29/446.39
  6. Step 6: Final answer
    x = 371.90

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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.