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Finding the Fourth Proportional to 479.76, 662.15 and 283.38

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Solution

The fourth proportional to 479.76, 662.15 and 283.38 is: 391.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.76 : 662.15 = 283.38 : x
  2. Step 2: Convert to fraction form
    479.76/662.15 = 283.38/x
  3. Step 3: Cross multiply
    479.76x = 662.15 × 283.38
  4. Step 4: Simplify right side
    479.76x = 187,638.65
  5. Step 5: Solve for x
    x = 187,638.65/479.76
  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.