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Finding the Fourth Proportional to 1,399,939.83, 1,932,062.09 and 856,437.53

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Solution

The fourth proportional to 1,399,939.83, 1,932,062.09 and 856,437.53 is: 1,181,972.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399,939.83 : 1,932,062.09 = 856,437.53 : x
  2. Step 2: Convert to fraction form
    1,399,939.83/1,932,062.09 = 856,437.53/x
  3. Step 3: Cross multiply
    1,399,939.83x = 1,932,062.09 × 856,437.53
  4. Step 4: Simplify right side
    1,399,939.83x = 1,654,690,470,223.74
  5. Step 5: Solve for x
    x = 1,654,690,470,223.74/1,399,939.83
  6. Step 6: Final answer
    x = 1,181,972.56

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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.