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Finding the Fourth Proportional to 2,614.11, 3,921.80 and 859.11

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Solution

The fourth proportional to 2,614.11, 3,921.80 and 859.11 is: 1,288.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,614.11 : 3,921.80 = 859.11 : x
  2. Step 2: Convert to fraction form
    2,614.11/3,921.80 = 859.11/x
  3. Step 3: Cross multiply
    2,614.11x = 3,921.80 × 859.11
  4. Step 4: Simplify right side
    2,614.11x = 3,369,265.49
  5. Step 5: Solve for x
    x = 3,369,265.49/2,614.11
  6. Step 6: Final answer
    x = 1,288.88

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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.