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Finding the Fourth Proportional to 7,468,898.40, 11,203,347.60 and 2,420,719.20

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Solution

The fourth proportional to 7,468,898.40, 11,203,347.60 and 2,420,719.20 is: 3,631,078.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,468,898.40 : 11,203,347.60 = 2,420,719.20 : x
  2. Step 2: Convert to fraction form
    7,468,898.40/11,203,347.60 = 2,420,719.20/x
  3. Step 3: Cross multiply
    7,468,898.40x = 11,203,347.60 × 2,420,719.20
  4. Step 4: Simplify right side
    7,468,898.40x = 27,120,158,639,593.92
  5. Step 5: Solve for x
    x = 27,120,158,639,593.92/7,468,898.40
  6. Step 6: Final answer
    x = 3,631,078.80

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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.