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Finding the Fourth Proportional to 961.95, 1,326.07 and 681.31

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Solution

The fourth proportional to 961.95, 1,326.07 and 681.31 is: 939.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.95 : 1,326.07 = 681.31 : x
  2. Step 2: Convert to fraction form
    961.95/1,326.07 = 681.31/x
  3. Step 3: Cross multiply
    961.95x = 1,326.07 × 681.31
  4. Step 4: Simplify right side
    961.95x = 903,464.75
  5. Step 5: Solve for x
    x = 903,464.75/961.95
  6. Step 6: Final answer
    x = 939.21

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.