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Finding the Fourth Proportional to 1,224,977.22, 1,690,353.09 and 1,134,697.86

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Solution

The fourth proportional to 1,224,977.22, 1,690,353.09 and 1,134,697.86 is: 1,565,776.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,224,977.22 : 1,690,353.09 = 1,134,697.86 : x
  2. Step 2: Convert to fraction form
    1,224,977.22/1,690,353.09 = 1,134,697.86/x
  3. Step 3: Cross multiply
    1,224,977.22x = 1,690,353.09 × 1,134,697.86
  4. Step 4: Simplify right side
    1,224,977.22x = 1,918,040,033,867.39
  5. Step 5: Solve for x
    x = 1,918,040,033,867.39/1,224,977.22
  6. Step 6: Final answer
    x = 1,565,776.08

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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.