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Finding the Fourth Proportional to 2,179.91, 3,270.18 and 718.92

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Solution

The fourth proportional to 2,179.91, 3,270.18 and 718.92 is: 1,078.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,179.91 : 3,270.18 = 718.92 : x
  2. Step 2: Convert to fraction form
    2,179.91/3,270.18 = 718.92/x
  3. Step 3: Cross multiply
    2,179.91x = 3,270.18 × 718.92
  4. Step 4: Simplify right side
    2,179.91x = 2,350,997.81
  5. Step 5: Solve for x
    x = 2,350,997.81/2,179.91
  6. Step 6: Final answer
    x = 1,078.48

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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.