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Finding the Fourth Proportional to 961.02, 1,440.30 and 550.38

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Solution

The fourth proportional to 961.02, 1,440.30 and 550.38 is: 824.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.02 : 1,440.30 = 550.38 : x
  2. Step 2: Convert to fraction form
    961.02/1,440.30 = 550.38/x
  3. Step 3: Cross multiply
    961.02x = 1,440.30 × 550.38
  4. Step 4: Simplify right side
    961.02x = 792,712.31
  5. Step 5: Solve for x
    x = 792,712.31/961.02
  6. Step 6: Final answer
    x = 824.87

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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.