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Finding the Fourth Proportional to 2,379.92, 3,568.92 and 992.31

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Solution

The fourth proportional to 2,379.92, 3,568.92 and 992.31 is: 1,488.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,379.92 : 3,568.92 = 992.31 : x
  2. Step 2: Convert to fraction form
    2,379.92/3,568.92 = 992.31/x
  3. Step 3: Cross multiply
    2,379.92x = 3,568.92 × 992.31
  4. Step 4: Simplify right side
    2,379.92x = 3,541,475.01
  5. Step 5: Solve for x
    x = 3,541,475.01/2,379.92
  6. Step 6: Final answer
    x = 1,488.07

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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.