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Finding the Fourth Proportional to 2,120.91, 3,181.98 and 950.65

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Solution

The fourth proportional to 2,120.91, 3,181.98 and 950.65 is: 1,426.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.91 : 3,181.98 = 950.65 : x
  2. Step 2: Convert to fraction form
    2,120.91/3,181.98 = 950.65/x
  3. Step 3: Cross multiply
    2,120.91x = 3,181.98 × 950.65
  4. Step 4: Simplify right side
    2,120.91x = 3,024,949.29
  5. Step 5: Solve for x
    x = 3,024,949.29/2,120.91
  6. Step 6: Final answer
    x = 1,426.25

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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.