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Finding the Fourth Proportional to 467.72, 644.88 and 320.12

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Solution

The fourth proportional to 467.72, 644.88 and 320.12 is: 441.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    467.72 : 644.88 = 320.12 : x
  2. Step 2: Convert to fraction form
    467.72/644.88 = 320.12/x
  3. Step 3: Cross multiply
    467.72x = 644.88 × 320.12
  4. Step 4: Simplify right side
    467.72x = 206,438.99
  5. Step 5: Solve for x
    x = 206,438.99/467.72
  6. Step 6: Final answer
    x = 441.37

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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.