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Finding the Fourth Proportional to 961.01, 1,324.96 and 628.91

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Solution

The fourth proportional to 961.01, 1,324.96 and 628.91 is: 867.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.01 : 1,324.96 = 628.91 : x
  2. Step 2: Convert to fraction form
    961.01/1,324.96 = 628.91/x
  3. Step 3: Cross multiply
    961.01x = 1,324.96 × 628.91
  4. Step 4: Simplify right side
    961.01x = 833,280.59
  5. Step 5: Solve for x
    x = 833,280.59/961.01
  6. Step 6: Final answer
    x = 867.09

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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.