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Finding the Fourth Proportional to 965.94, 1,449.66 and 636.78

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Solution

The fourth proportional to 965.94, 1,449.66 and 636.78 is: 955.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.94 : 1,449.66 = 636.78 : x
  2. Step 2: Convert to fraction form
    965.94/1,449.66 = 636.78/x
  3. Step 3: Cross multiply
    965.94x = 1,449.66 × 636.78
  4. Step 4: Simplify right side
    965.94x = 923,114.49
  5. Step 5: Solve for x
    x = 923,114.49/965.94
  6. Step 6: Final answer
    x = 955.66

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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.