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Finding the Fourth Proportional to 961.00, 1,326.27 and 629.61

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Solution

The fourth proportional to 961.00, 1,326.27 and 629.61 is: 868.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.00 : 1,326.27 = 629.61 : x
  2. Step 2: Convert to fraction form
    961.00/1,326.27 = 629.61/x
  3. Step 3: Cross multiply
    961.00x = 1,326.27 × 629.61
  4. Step 4: Simplify right side
    961.00x = 835,030.24
  5. Step 5: Solve for x
    x = 835,030.24/961.00
  6. Step 6: Final answer
    x = 868.92

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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.