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Finding the Fourth Proportional to 643.93, 965.79 and 297.25

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Solution

The fourth proportional to 643.93, 965.79 and 297.25 is: 445.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.93 : 965.79 = 297.25 : x
  2. Step 2: Convert to fraction form
    643.93/965.79 = 297.25/x
  3. Step 3: Cross multiply
    643.93x = 965.79 × 297.25
  4. Step 4: Simplify right side
    643.93x = 287,081.08
  5. Step 5: Solve for x
    x = 287,081.08/643.93
  6. Step 6: Final answer
    x = 445.83

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Double scale
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Similar ratio
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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.