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Finding the Fourth Proportional to 1,970,600.78, 2,719,617.46 and 1,235,672.12

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Solution

The fourth proportional to 1,970,600.78, 2,719,617.46 and 1,235,672.12 is: 1,705,345.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,970,600.78 : 2,719,617.46 = 1,235,672.12 : x
  2. Step 2: Convert to fraction form
    1,970,600.78/2,719,617.46 = 1,235,672.12/x
  3. Step 3: Cross multiply
    1,970,600.78x = 2,719,617.46 × 1,235,672.12
  4. Step 4: Simplify right side
    1,970,600.78x = 3,360,555,472,387.22
  5. Step 5: Solve for x
    x = 3,360,555,472,387.22/1,970,600.78
  6. Step 6: Final answer
    x = 1,705,345.65

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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.