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Finding the Fourth Proportional to 1,613.92, 2,227.14 and 992.92

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Solution

The fourth proportional to 1,613.92, 2,227.14 and 992.92 is: 1,370.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,613.92 : 2,227.14 = 992.92 : x
  2. Step 2: Convert to fraction form
    1,613.92/2,227.14 = 992.92/x
  3. Step 3: Cross multiply
    1,613.92x = 2,227.14 × 992.92
  4. Step 4: Simplify right side
    1,613.92x = 2,211,371.85
  5. Step 5: Solve for x
    x = 2,211,371.85/1,613.92
  6. Step 6: Final answer
    x = 1,370.19

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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.