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Finding the Fourth Proportional to 670,930,636.69, 925,873,224.56 and 392,519,325.61

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Solution

The fourth proportional to 670,930,636.69, 925,873,224.56 and 392,519,325.61 is: 541,670,202.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,930,636.69 : 925,873,224.56 = 392,519,325.61 : x
  2. Step 2: Convert to fraction form
    670,930,636.69/925,873,224.56 = 392,519,325.61/x
  3. Step 3: Cross multiply
    670,930,636.69x = 925,873,224.56 × 392,519,325.61
  4. Step 4: Simplify right side
    670,930,636.69x = 363,423,133,700,369,984
  5. Step 5: Solve for x
    x = 363,423,133,700,369,984/670,930,636.69
  6. Step 6: Final answer
    x = 541,670,202.29

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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.