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Finding the Fourth Proportional to 467.28, 644.85 and 301.80

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Solution

The fourth proportional to 467.28, 644.85 and 301.80 is: 416.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    467.28 : 644.85 = 301.80 : x
  2. Step 2: Convert to fraction form
    467.28/644.85 = 301.80/x
  3. Step 3: Cross multiply
    467.28x = 644.85 × 301.80
  4. Step 4: Simplify right side
    467.28x = 194,615.73
  5. Step 5: Solve for x
    x = 194,615.73/467.28
  6. Step 6: Final answer
    x = 416.49

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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.