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Finding the Fourth Proportional to 479.95, 662.42 and 283.57

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Solution

The fourth proportional to 479.95, 662.42 and 283.57 is: 391.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.95 : 662.42 = 283.57 : x
  2. Step 2: Convert to fraction form
    479.95/662.42 = 283.57/x
  3. Step 3: Cross multiply
    479.95x = 662.42 × 283.57
  4. Step 4: Simplify right side
    479.95x = 187,842.44
  5. Step 5: Solve for x
    x = 187,842.44/479.95
  6. Step 6: Final answer
    x = 391.38

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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.