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Finding the Fourth Proportional to 664.20, 915.50 and 467.37

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Solution

The fourth proportional to 664.20, 915.50 and 467.37 is: 644.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.20 : 915.50 = 467.37 : x
  2. Step 2: Convert to fraction form
    664.20/915.50 = 467.37/x
  3. Step 3: Cross multiply
    664.20x = 915.50 × 467.37
  4. Step 4: Simplify right side
    664.20x = 427,874.90
  5. Step 5: Solve for x
    x = 427,874.90/664.20
  6. Step 6: Final answer
    x = 644.20

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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.