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Finding the Fourth Proportional to 1,298,981.11, 1,947,973.21 and 445,893.70

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Solution

The fourth proportional to 1,298,981.11, 1,947,973.21 and 445,893.70 is: 668,669.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298,981.11 : 1,947,973.21 = 445,893.70 : x
  2. Step 2: Convert to fraction form
    1,298,981.11/1,947,973.21 = 445,893.70/x
  3. Step 3: Cross multiply
    1,298,981.11x = 1,947,973.21 × 445,893.70
  4. Step 4: Simplify right side
    1,298,981.11x = 868,588,982,107.78
  5. Step 5: Solve for x
    x = 868,588,982,107.78/1,298,981.11
  6. Step 6: Final answer
    x = 668,669.45

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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.