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Finding the Fourth Proportional to 1,147.91, 1,584.25 and 961.07

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Solution

The fourth proportional to 1,147.91, 1,584.25 and 961.07 is: 1,326.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.91 : 1,584.25 = 961.07 : x
  2. Step 2: Convert to fraction form
    1,147.91/1,584.25 = 961.07/x
  3. Step 3: Cross multiply
    1,147.91x = 1,584.25 × 961.07
  4. Step 4: Simplify right side
    1,147.91x = 1,522,575.15
  5. Step 5: Solve for x
    x = 1,522,575.15/1,147.91
  6. Step 6: Final answer
    x = 1,326.39

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1.5x scale

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.