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Finding the Fourth Proportional to 965.54, 1,331.45 and 826.12

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Solution

The fourth proportional to 965.54, 1,331.45 and 826.12 is: 1,139.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.54 : 1,331.45 = 826.12 : x
  2. Step 2: Convert to fraction form
    965.54/1,331.45 = 826.12/x
  3. Step 3: Cross multiply
    965.54x = 1,331.45 × 826.12
  4. Step 4: Simplify right side
    965.54x = 1,099,935.01
  5. Step 5: Solve for x
    x = 1,099,935.01/965.54
  6. Step 6: Final answer
    x = 1,139.19

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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.