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Finding the Fourth Proportional to 1,837,129.40, 2,750,778.90 and 1,168,662.20

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Solution

The fourth proportional to 1,837,129.40, 2,750,778.90 and 1,168,662.20 is: 1,749,866.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,837,129.40 : 2,750,778.90 = 1,168,662.20 : x
  2. Step 2: Convert to fraction form
    1,837,129.40/2,750,778.90 = 1,168,662.20/x
  3. Step 3: Cross multiply
    1,837,129.40x = 2,750,778.90 × 1,168,662.20
  4. Step 4: Simplify right side
    1,837,129.40x = 3,214,731,320,987.58
  5. Step 5: Solve for x
    x = 3,214,731,320,987.58/1,837,129.40
  6. Step 6: Final answer
    x = 1,749,866.57

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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.