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Finding the Fourth Proportional to 641.39, 960.64 and 552.53

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Solution

The fourth proportional to 641.39, 960.64 and 552.53 is: 827.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.39 : 960.64 = 552.53 : x
  2. Step 2: Convert to fraction form
    641.39/960.64 = 552.53/x
  3. Step 3: Cross multiply
    641.39x = 960.64 × 552.53
  4. Step 4: Simplify right side
    641.39x = 530,783.44
  5. Step 5: Solve for x
    x = 530,783.44/641.39
  6. Step 6: Final answer
    x = 827.56

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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.