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Finding the Fourth Proportional to 965.22, 1,331.91 and 572.19

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Solution

The fourth proportional to 965.22, 1,331.91 and 572.19 is: 789.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.22 : 1,331.91 = 572.19 : x
  2. Step 2: Convert to fraction form
    965.22/1,331.91 = 572.19/x
  3. Step 3: Cross multiply
    965.22x = 1,331.91 × 572.19
  4. Step 4: Simplify right side
    965.22x = 762,105.58
  5. Step 5: Solve for x
    x = 762,105.58/965.22
  6. Step 6: Final answer
    x = 789.57

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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.