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Finding the Fourth Proportional to 645.44, 966.77 and 425.82

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Solution

The fourth proportional to 645.44, 966.77 and 425.82 is: 637.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.44 : 966.77 = 425.82 : x
  2. Step 2: Convert to fraction form
    645.44/966.77 = 425.82/x
  3. Step 3: Cross multiply
    645.44x = 966.77 × 425.82
  4. Step 4: Simplify right side
    645.44x = 411,667.87
  5. Step 5: Solve for x
    x = 411,667.87/645.44
  6. Step 6: Final answer
    x = 637.81

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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.