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Finding the Fourth Proportional to 961.27, 1,440.76 and 550.69

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Solution

The fourth proportional to 961.27, 1,440.76 and 550.69 is: 825.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.27 : 1,440.76 = 550.69 : x
  2. Step 2: Convert to fraction form
    961.27/1,440.76 = 550.69/x
  3. Step 3: Cross multiply
    961.27x = 1,440.76 × 550.69
  4. Step 4: Simplify right side
    961.27x = 793,412.12
  5. Step 5: Solve for x
    x = 793,412.12/961.27
  6. Step 6: Final answer
    x = 825.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.