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Finding the Fourth Proportional to 1,986,366.87, 2,979,263.52 and 638,353.53

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Solution

The fourth proportional to 1,986,366.87, 2,979,263.52 and 638,353.53 is: 957,438.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986,366.87 : 2,979,263.52 = 638,353.53 : x
  2. Step 2: Convert to fraction form
    1,986,366.87/2,979,263.52 = 638,353.53/x
  3. Step 3: Cross multiply
    1,986,366.87x = 2,979,263.52 × 638,353.53
  4. Step 4: Simplify right side
    1,986,366.87x = 1,901,823,384,792.23
  5. Step 5: Solve for x
    x = 1,901,823,384,792.23/1,986,366.87
  6. Step 6: Final answer
    x = 957,438.13

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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.