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Finding the Fourth Proportional to 447.09, 670.57 and 122.48

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Solution

The fourth proportional to 447.09, 670.57 and 122.48 is: 183.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.09 : 670.57 = 122.48 : x
  2. Step 2: Convert to fraction form
    447.09/670.57 = 122.48/x
  3. Step 3: Cross multiply
    447.09x = 670.57 × 122.48
  4. Step 4: Simplify right side
    447.09x = 82,131.41
  5. Step 5: Solve for x
    x = 82,131.41/447.09
  6. Step 6: Final answer
    x = 183.70

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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.