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Finding the Fourth Proportional to 1,216,787.60, 1,826,218.20 and 543,904.40

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Solution

The fourth proportional to 1,216,787.60, 1,826,218.20 and 543,904.40 is: 816,320.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216,787.60 : 1,826,218.20 = 543,904.40 : x
  2. Step 2: Convert to fraction form
    1,216,787.60/1,826,218.20 = 543,904.40/x
  3. Step 3: Cross multiply
    1,216,787.60x = 1,826,218.20 × 543,904.40
  4. Step 4: Simplify right side
    1,216,787.60x = 993,288,114,340.08
  5. Step 5: Solve for x
    x = 993,288,114,340.08/1,216,787.60
  6. Step 6: Final answer
    x = 816,320.05

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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.