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Finding the Fourth Proportional to 965.21, 1,447.81 and 677.93

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Solution

The fourth proportional to 965.21, 1,447.81 and 677.93 is: 1,016.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.21 : 1,447.81 = 677.93 : x
  2. Step 2: Convert to fraction form
    965.21/1,447.81 = 677.93/x
  3. Step 3: Cross multiply
    965.21x = 1,447.81 × 677.93
  4. Step 4: Simplify right side
    965.21x = 981,504.90
  5. Step 5: Solve for x
    x = 981,504.90/965.21
  6. Step 6: Final answer
    x = 1,016.89

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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.