Home / 2,158,039.64-2,978,078.32-1,191,169.78

Finding the Fourth Proportional to 2,158,039.64, 2,978,078.32 and 1,191,169.78

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Solution

The fourth proportional to 2,158,039.64, 2,978,078.32 and 1,191,169.78 is: 1,643,805.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,158,039.64 : 2,978,078.32 = 1,191,169.78 : x
  2. Step 2: Convert to fraction form
    2,158,039.64/2,978,078.32 = 1,191,169.78/x
  3. Step 3: Cross multiply
    2,158,039.64x = 2,978,078.32 × 1,191,169.78
  4. Step 4: Simplify right side
    2,158,039.64x = 3,547,396,897,257.17
  5. Step 5: Solve for x
    x = 3,547,396,897,257.17/2,158,039.64
  6. Step 6: Final answer
    x = 1,643,805.25

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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.