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Finding the Fourth Proportional to 479.87, 720.42 and 249.23

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Solution

The fourth proportional to 479.87, 720.42 and 249.23 is: 374.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.87 : 720.42 = 249.23 : x
  2. Step 2: Convert to fraction form
    479.87/720.42 = 249.23/x
  3. Step 3: Cross multiply
    479.87x = 720.42 × 249.23
  4. Step 4: Simplify right side
    479.87x = 179,550.28
  5. Step 5: Solve for x
    x = 179,550.28/479.87
  6. Step 6: Final answer
    x = 374.16

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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.