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Finding the Fourth Proportional to 6,611,728.80, 9,917,593.20 and 6,561,962.40

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Solution

The fourth proportional to 6,611,728.80, 9,917,593.20 and 6,561,962.40 is: 9,842,943.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,611,728.80 : 9,917,593.20 = 6,561,962.40 : x
  2. Step 2: Convert to fraction form
    6,611,728.80/9,917,593.20 = 6,561,962.40/x
  3. Step 3: Cross multiply
    6,611,728.80x = 9,917,593.20 × 6,561,962.40
  4. Step 4: Simplify right side
    6,611,728.80x = 65,078,873,676,895.68
  5. Step 5: Solve for x
    x = 65,078,873,676,895.68/6,611,728.80
  6. Step 6: Final answer
    x = 9,842,943.60

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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.