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Finding the Fourth Proportional to 963.73, 1,329.71 and 648.44

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Solution

The fourth proportional to 963.73, 1,329.71 and 648.44 is: 894.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.73 : 1,329.71 = 648.44 : x
  2. Step 2: Convert to fraction form
    963.73/1,329.71 = 648.44/x
  3. Step 3: Cross multiply
    963.73x = 1,329.71 × 648.44
  4. Step 4: Simplify right side
    963.73x = 862,237.15
  5. Step 5: Solve for x
    x = 862,237.15/963.73
  6. Step 6: Final answer
    x = 894.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.