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Finding the Fourth Proportional to 647,959,143.92, 893,854,195.32 and 393,572,806.51

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Solution

The fourth proportional to 647,959,143.92, 893,854,195.32 and 393,572,806.51 is: 542,930,380.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,959,143.92 : 893,854,195.32 = 393,572,806.51 : x
  2. Step 2: Convert to fraction form
    647,959,143.92/893,854,195.32 = 393,572,806.51/x
  3. Step 3: Cross multiply
    647,959,143.92x = 893,854,195.32 × 393,572,806.51
  4. Step 4: Simplify right side
    647,959,143.92x = 351,796,704,256,392,960
  5. Step 5: Solve for x
    x = 351,796,704,256,392,960/647,959,143.92
  6. Step 6: Final answer
    x = 542,930,380.04

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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.