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Finding the Fourth Proportional to 2,728.83, 4,092.84 and 879.71

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Solution

The fourth proportional to 2,728.83, 4,092.84 and 879.71 is: 1,319.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,728.83 : 4,092.84 = 879.71 : x
  2. Step 2: Convert to fraction form
    2,728.83/4,092.84 = 879.71/x
  3. Step 3: Cross multiply
    2,728.83x = 4,092.84 × 879.71
  4. Step 4: Simplify right side
    2,728.83x = 3,600,491.81
  5. Step 5: Solve for x
    x = 3,600,491.81/2,728.83
  6. Step 6: Final answer
    x = 1,319.43

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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.