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Finding the Fourth Proportional to 644.74, 965.81 and 297.59

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Solution

The fourth proportional to 644.74, 965.81 and 297.59 is: 445.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.74 : 965.81 = 297.59 : x
  2. Step 2: Convert to fraction form
    644.74/965.81 = 297.59/x
  3. Step 3: Cross multiply
    644.74x = 965.81 × 297.59
  4. Step 4: Simplify right side
    644.74x = 287,415.40
  5. Step 5: Solve for x
    x = 287,415.40/644.74
  6. Step 6: Final answer
    x = 445.78

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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.