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Finding the Fourth Proportional to 2,149.60, 3,221.88 and 992.92

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Solution

The fourth proportional to 2,149.60, 3,221.88 and 992.92 is: 1,488.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,149.60 : 3,221.88 = 992.92 : x
  2. Step 2: Convert to fraction form
    2,149.60/3,221.88 = 992.92/x
  3. Step 3: Cross multiply
    2,149.60x = 3,221.88 × 992.92
  4. Step 4: Simplify right side
    2,149.60x = 3,199,069.09
  5. Step 5: Solve for x
    x = 3,199,069.09/2,149.60
  6. Step 6: Final answer
    x = 1,488.22

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1.5x scale

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.