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Finding the Fourth Proportional to 2,978,917.64, 4,110,783.54 and 1,620,796.04

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Solution

The fourth proportional to 2,978,917.64, 4,110,783.54 and 1,620,796.04 is: 2,236,631.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,978,917.64 : 4,110,783.54 = 1,620,796.04 : x
  2. Step 2: Convert to fraction form
    2,978,917.64/4,110,783.54 = 1,620,796.04/x
  3. Step 3: Cross multiply
    2,978,917.64x = 4,110,783.54 × 1,620,796.04
  4. Step 4: Simplify right side
    2,978,917.64x = 6,662,741,682,929.18
  5. Step 5: Solve for x
    x = 6,662,741,682,929.18/2,978,917.64
  6. Step 6: Final answer
    x = 2,236,631.72

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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.