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Finding the Fourth Proportional to 1,171,772.11, 1,757,658.16 and 1,111,935.79

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Solution

The fourth proportional to 1,171,772.11, 1,757,658.16 and 1,111,935.79 is: 1,667,903.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,171,772.11 : 1,757,658.16 = 1,111,935.79 : x
  2. Step 2: Convert to fraction form
    1,171,772.11/1,757,658.16 = 1,111,935.79/x
  3. Step 3: Cross multiply
    1,171,772.11x = 1,757,658.16 × 1,111,935.79
  4. Step 4: Simplify right side
    1,171,772.11x = 1,954,403,005,901.26
  5. Step 5: Solve for x
    x = 1,954,403,005,901.26/1,171,772.11
  6. Step 6: Final answer
    x = 1,667,903.68

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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.