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Finding the Fourth Proportional to 965.13, 1,331.64 and 571.93

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Solution

The fourth proportional to 965.13, 1,331.64 and 571.93 is: 789.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.13 : 1,331.64 = 571.93 : x
  2. Step 2: Convert to fraction form
    965.13/1,331.64 = 571.93/x
  3. Step 3: Cross multiply
    965.13x = 1,331.64 × 571.93
  4. Step 4: Simplify right side
    965.13x = 761,604.87
  5. Step 5: Solve for x
    x = 761,604.87/965.13
  6. Step 6: Final answer
    x = 789.12

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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.