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Finding the Fourth Proportional to 1,918,794.57, 2,879,695.89 and 1,338,645.03

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Solution

The fourth proportional to 1,918,794.57, 2,879,695.89 and 1,338,645.03 is: 2,009,016.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918,794.57 : 2,879,695.89 = 1,338,645.03 : x
  2. Step 2: Convert to fraction form
    1,918,794.57/2,879,695.89 = 1,338,645.03/x
  3. Step 3: Cross multiply
    1,918,794.57x = 2,879,695.89 × 1,338,645.03
  4. Step 4: Simplify right side
    1,918,794.57x = 3,854,890,591,059.93
  5. Step 5: Solve for x
    x = 3,854,890,591,059.93/1,918,794.57
  6. Step 6: Final answer
    x = 2,009,016.83

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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.