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Finding the Fourth Proportional to 467.64, 644.64 and 369.20

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Solution

The fourth proportional to 467.64, 644.64 and 369.20 is: 508.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    467.64 : 644.64 = 369.20 : x
  2. Step 2: Convert to fraction form
    467.64/644.64 = 369.20/x
  3. Step 3: Cross multiply
    467.64x = 644.64 × 369.20
  4. Step 4: Simplify right side
    467.64x = 238,001.09
  5. Step 5: Solve for x
    x = 238,001.09/467.64
  6. Step 6: Final answer
    x = 508.94

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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.