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Finding the Fourth Proportional to 644.21, 965.88 and 297.35

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Solution

The fourth proportional to 644.21, 965.88 and 297.35 is: 445.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.21 : 965.88 = 297.35 : x
  2. Step 2: Convert to fraction form
    644.21/965.88 = 297.35/x
  3. Step 3: Cross multiply
    644.21x = 965.88 × 297.35
  4. Step 4: Simplify right side
    644.21x = 287,208.85
  5. Step 5: Solve for x
    x = 287,208.85/644.21
  6. Step 6: Final answer
    x = 445.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.