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Finding the Fourth Proportional to 1,298,979.11, 1,947,970.22 and 445,891.70

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Solution

The fourth proportional to 1,298,979.11, 1,947,970.22 and 445,891.70 is: 668,666.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298,979.11 : 1,947,970.22 = 445,891.70 : x
  2. Step 2: Convert to fraction form
    1,298,979.11/1,947,970.22 = 445,891.70/x
  3. Step 3: Cross multiply
    1,298,979.11x = 1,947,970.22 × 445,891.70
  4. Step 4: Simplify right side
    1,298,979.11x = 868,583,740,975.87
  5. Step 5: Solve for x
    x = 868,583,740,975.87/1,298,979.11
  6. Step 6: Final answer
    x = 668,666.45

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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.