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Finding the Fourth Proportional to 479.88, 662.21 and 283.39

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Solution

The fourth proportional to 479.88, 662.21 and 283.39 is: 391.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.88 : 662.21 = 283.39 : x
  2. Step 2: Convert to fraction form
    479.88/662.21 = 283.39/x
  3. Step 3: Cross multiply
    479.88x = 662.21 × 283.39
  4. Step 4: Simplify right side
    479.88x = 187,661.68
  5. Step 5: Solve for x
    x = 187,661.68/479.88
  6. Step 6: Final answer
    x = 391.06

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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.