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Finding the Fourth Proportional to 1,191,917.07, 1,787,835.78 and 517,998.42

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Solution

The fourth proportional to 1,191,917.07, 1,787,835.78 and 517,998.42 is: 776,980.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,191,917.07 : 1,787,835.78 = 517,998.42 : x
  2. Step 2: Convert to fraction form
    1,191,917.07/1,787,835.78 = 517,998.42/x
  3. Step 3: Cross multiply
    1,191,917.07x = 1,787,835.78 × 517,998.42
  4. Step 4: Simplify right side
    1,191,917.07x = 926,096,109,259.47
  5. Step 5: Solve for x
    x = 926,096,109,259.47/1,191,917.07
  6. Step 6: Final answer
    x = 776,980.32

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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.