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Finding the Fourth Proportional to 441.63, 662.51 and 320.80

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Solution

The fourth proportional to 441.63, 662.51 and 320.80 is: 481.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.63 : 662.51 = 320.80 : x
  2. Step 2: Convert to fraction form
    441.63/662.51 = 320.80/x
  3. Step 3: Cross multiply
    441.63x = 662.51 × 320.80
  4. Step 4: Simplify right side
    441.63x = 212,533.21
  5. Step 5: Solve for x
    x = 212,533.21/441.63
  6. Step 6: Final answer
    x = 481.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.