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Finding the Fourth Proportional to 467.20, 644.65 and 270.64

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Solution

The fourth proportional to 467.20, 644.65 and 270.64 is: 373.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    467.20 : 644.65 = 270.64 : x
  2. Step 2: Convert to fraction form
    467.20/644.65 = 270.64/x
  3. Step 3: Cross multiply
    467.20x = 644.65 × 270.64
  4. Step 4: Simplify right side
    467.20x = 174,468.08
  5. Step 5: Solve for x
    x = 174,468.08/467.20
  6. Step 6: Final answer
    x = 373.43

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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.