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Finding the Fourth Proportional to 479.90, 662.27 and 283.42

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Solution

The fourth proportional to 479.90, 662.27 and 283.42 is: 391.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.90 : 662.27 = 283.42 : x
  2. Step 2: Convert to fraction form
    479.90/662.27 = 283.42/x
  3. Step 3: Cross multiply
    479.90x = 662.27 × 283.42
  4. Step 4: Simplify right side
    479.90x = 187,700.56
  5. Step 5: Solve for x
    x = 187,700.56/479.90
  6. Step 6: Final answer
    x = 391.12

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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.