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Finding the Fourth Proportional to 1,966,117.66, 2,713,684.90 and 1,286,660.50

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Solution

The fourth proportional to 1,966,117.66, 2,713,684.90 and 1,286,660.50 is: 1,775,881.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,966,117.66 : 2,713,684.90 = 1,286,660.50 : x
  2. Step 2: Convert to fraction form
    1,966,117.66/2,713,684.90 = 1,286,660.50/x
  3. Step 3: Cross multiply
    1,966,117.66x = 2,713,684.90 × 1,286,660.50
  4. Step 4: Simplify right side
    1,966,117.66x = 3,491,591,170,276.45
  5. Step 5: Solve for x
    x = 3,491,591,170,276.45/1,966,117.66
  6. Step 6: Final answer
    x = 1,775,881.09

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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.