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Finding the Fourth Proportional to 512.62, 709.26 and 447.24

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Solution

The fourth proportional to 512.62, 709.26 and 447.24 is: 618.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.62 : 709.26 = 447.24 : x
  2. Step 2: Convert to fraction form
    512.62/709.26 = 447.24/x
  3. Step 3: Cross multiply
    512.62x = 709.26 × 447.24
  4. Step 4: Simplify right side
    512.62x = 317,209.44
  5. Step 5: Solve for x
    x = 317,209.44/512.62
  6. Step 6: Final answer
    x = 618.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.