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Finding the Fourth Proportional to 961.08, 1,325.80 and 739.95

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Solution

The fourth proportional to 961.08, 1,325.80 and 739.95 is: 1,020.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.08 : 1,325.80 = 739.95 : x
  2. Step 2: Convert to fraction form
    961.08/1,325.80 = 739.95/x
  3. Step 3: Cross multiply
    961.08x = 1,325.80 × 739.95
  4. Step 4: Simplify right side
    961.08x = 981,025.71
  5. Step 5: Solve for x
    x = 981,025.71/961.08
  6. Step 6: Final answer
    x = 1,020.75

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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.