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Finding the Fourth Proportional to 961.56, 1,327.68 and 607.59

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Solution

The fourth proportional to 961.56, 1,327.68 and 607.59 is: 838.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.56 : 1,327.68 = 607.59 : x
  2. Step 2: Convert to fraction form
    961.56/1,327.68 = 607.59/x
  3. Step 3: Cross multiply
    961.56x = 1,327.68 × 607.59
  4. Step 4: Simplify right side
    961.56x = 806,685.09
  5. Step 5: Solve for x
    x = 806,685.09/961.56
  6. Step 6: Final answer
    x = 838.93

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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.