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Finding the Fourth Proportional to 965.44, 1,331.76 and 633.76

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Solution

The fourth proportional to 965.44, 1,331.76 and 633.76 is: 874.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.44 : 1,331.76 = 633.76 : x
  2. Step 2: Convert to fraction form
    965.44/1,331.76 = 633.76/x
  3. Step 3: Cross multiply
    965.44x = 1,331.76 × 633.76
  4. Step 4: Simplify right side
    965.44x = 844,016.22
  5. Step 5: Solve for x
    x = 844,016.22/965.44
  6. Step 6: Final answer
    x = 874.23

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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.