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Finding the Fourth Proportional to 1,298,971.89, 1,947,959.55 and 445,884.57

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Solution

The fourth proportional to 1,298,971.89, 1,947,959.55 and 445,884.57 is: 668,655.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298,971.89 : 1,947,959.55 = 445,884.57 : x
  2. Step 2: Convert to fraction form
    1,298,971.89/1,947,959.55 = 445,884.57/x
  3. Step 3: Cross multiply
    1,298,971.89x = 1,947,959.55 × 445,884.57
  4. Step 4: Simplify right side
    1,298,971.89x = 868,565,106,329.14
  5. Step 5: Solve for x
    x = 868,565,106,329.14/1,298,971.89
  6. Step 6: Final answer
    x = 668,655.81

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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.