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Finding the Fourth Proportional to 3,209,379.60, 4,428,978.84 and 1,759,043.28

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Solution

The fourth proportional to 3,209,379.60, 4,428,978.84 and 1,759,043.28 is: 2,427,498.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,209,379.60 : 4,428,978.84 = 1,759,043.28 : x
  2. Step 2: Convert to fraction form
    3,209,379.60/4,428,978.84 = 1,759,043.28/x
  3. Step 3: Cross multiply
    3,209,379.60x = 4,428,978.84 × 1,759,043.28
  4. Step 4: Simplify right side
    3,209,379.60x = 7,790,765,465,764.20
  5. Step 5: Solve for x
    x = 7,790,765,465,764.20/3,209,379.60
  6. Step 6: Final answer
    x = 2,427,498.91

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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.