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Finding the Fourth Proportional to 2,826.64, 3,900.78 and 1,584.64

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Solution

The fourth proportional to 2,826.64, 3,900.78 and 1,584.64 is: 2,186.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,826.64 : 3,900.78 = 1,584.64 : x
  2. Step 2: Convert to fraction form
    2,826.64/3,900.78 = 1,584.64/x
  3. Step 3: Cross multiply
    2,826.64x = 3,900.78 × 1,584.64
  4. Step 4: Simplify right side
    2,826.64x = 6,181,332.02
  5. Step 5: Solve for x
    x = 6,181,332.02/2,826.64
  6. Step 6: Final answer
    x = 2,186.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.