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Finding the Fourth Proportional to 647,959,146.92, 893,854,199.45 and 393,572,809.51

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Solution

The fourth proportional to 647,959,146.92, 893,854,199.45 and 393,572,809.51 is: 542,930,384.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,959,146.92 : 893,854,199.45 = 393,572,809.51 : x
  2. Step 2: Convert to fraction form
    647,959,146.92/893,854,199.45 = 393,572,809.51/x
  3. Step 3: Cross multiply
    647,959,146.92x = 893,854,199.45 × 393,572,809.51
  4. Step 4: Simplify right side
    647,959,146.92x = 351,796,708,569,848,384
  5. Step 5: Solve for x
    x = 351,796,708,569,848,384/647,959,146.92
  6. Step 6: Final answer
    x = 542,930,384.18

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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.