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Finding the Fourth Proportional to 1,978,947.11, 2,730,952.25 and 1,073,529.11

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Solution

The fourth proportional to 1,978,947.11, 2,730,952.25 and 1,073,529.11 is: 1,481,473.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,978,947.11 : 2,730,952.25 = 1,073,529.11 : x
  2. Step 2: Convert to fraction form
    1,978,947.11/2,730,952.25 = 1,073,529.11/x
  3. Step 3: Cross multiply
    1,978,947.11x = 2,730,952.25 × 1,073,529.11
  4. Step 4: Simplify right side
    1,978,947.11x = 2,931,756,719,372.59
  5. Step 5: Solve for x
    x = 2,931,756,719,372.59/1,978,947.11
  6. Step 6: Final answer
    x = 1,481,473.01

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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.