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Finding the Fourth Proportional to 479.79, 662.09 and 283.43

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Solution

The fourth proportional to 479.79, 662.09 and 283.43 is: 391.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.79 : 662.09 = 283.43 : x
  2. Step 2: Convert to fraction form
    479.79/662.09 = 283.43/x
  3. Step 3: Cross multiply
    479.79x = 662.09 × 283.43
  4. Step 4: Simplify right side
    479.79x = 187,651.44
  5. Step 5: Solve for x
    x = 187,651.44/479.79
  6. Step 6: Final answer
    x = 391.11

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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.