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Finding the Fourth Proportional to 1,916,759.80, 2,645,978.70 and 1,238,027.32

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Solution

The fourth proportional to 1,916,759.80, 2,645,978.70 and 1,238,027.32 is: 1,709,026.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,916,759.80 : 2,645,978.70 = 1,238,027.32 : x
  2. Step 2: Convert to fraction form
    1,916,759.80/2,645,978.70 = 1,238,027.32/x
  3. Step 3: Cross multiply
    1,916,759.80x = 2,645,978.70 × 1,238,027.32
  4. Step 4: Simplify right side
    1,916,759.80x = 3,275,793,918,738.08
  5. Step 5: Solve for x
    x = 3,275,793,918,738.08/1,916,759.80
  6. Step 6: Final answer
    x = 1,709,026.83

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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.