Home / 1,986,370.12-2,979,268.39-638,356.78

Finding the Fourth Proportional to 1,986,370.12, 2,979,268.39 and 638,356.78

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Solution

The fourth proportional to 1,986,370.12, 2,979,268.39 and 638,356.78 is: 957,443.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986,370.12 : 2,979,268.39 = 638,356.78 : x
  2. Step 2: Convert to fraction form
    1,986,370.12/2,979,268.39 = 638,356.78/x
  3. Step 3: Cross multiply
    1,986,370.12x = 2,979,268.39 × 638,356.78
  4. Step 4: Simplify right side
    1,986,370.12x = 1,901,836,176,196.18
  5. Step 5: Solve for x
    x = 1,901,836,176,196.18/1,986,370.12
  6. Step 6: Final answer
    x = 957,443.00

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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.