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Finding the Fourth Proportional to 1,959,207.92, 2,939,946.88 and 821,869.50

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Solution

The fourth proportional to 1,959,207.92, 2,939,946.88 and 821,869.50 is: 1,233,280.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,959,207.92 : 2,939,946.88 = 821,869.50 : x
  2. Step 2: Convert to fraction form
    1,959,207.92/2,939,946.88 = 821,869.50/x
  3. Step 3: Cross multiply
    1,959,207.92x = 2,939,946.88 × 821,869.50
  4. Step 4: Simplify right side
    1,959,207.92x = 2,416,252,672,292.16
  5. Step 5: Solve for x
    x = 2,416,252,672,292.16/1,959,207.92
  6. Step 6: Final answer
    x = 1,233,280.37

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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.