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Finding the Fourth Proportional to 479.99, 662.39 and 463.43

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Solution

The fourth proportional to 479.99, 662.39 and 463.43 is: 639.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.99 : 662.39 = 463.43 : x
  2. Step 2: Convert to fraction form
    479.99/662.39 = 463.43/x
  3. Step 3: Cross multiply
    479.99x = 662.39 × 463.43
  4. Step 4: Simplify right side
    479.99x = 306,974.21
  5. Step 5: Solve for x
    x = 306,974.21/479.99
  6. Step 6: Final answer
    x = 639.54

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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.