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Finding the Fourth Proportional to 621,695,999.88, 858,015,713.88 and 353,836,962.04

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Solution

The fourth proportional to 621,695,999.88, 858,015,713.88 and 353,836,962.04 is: 488,337,826.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,695,999.88 : 858,015,713.88 = 353,836,962.04 : x
  2. Step 2: Convert to fraction form
    621,695,999.88/858,015,713.88 = 353,836,962.04/x
  3. Step 3: Cross multiply
    621,695,999.88x = 858,015,713.88 × 353,836,962.04
  4. Step 4: Simplify right side
    621,695,999.88x = 303,597,673,581,881,088
  5. Step 5: Solve for x
    x = 303,597,673,581,881,088/621,695,999.88
  6. Step 6: Final answer
    x = 488,337,826.91

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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.