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Finding the Fourth Proportional to 479.90, 662.46 and 322.68

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Solution

The fourth proportional to 479.90, 662.46 and 322.68 is: 445.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.90 : 662.46 = 322.68 : x
  2. Step 2: Convert to fraction form
    479.90/662.46 = 322.68/x
  3. Step 3: Cross multiply
    479.90x = 662.46 × 322.68
  4. Step 4: Simplify right side
    479.90x = 213,762.59
  5. Step 5: Solve for x
    x = 213,762.59/479.90
  6. Step 6: Final answer
    x = 445.43

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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.