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Finding the Fourth Proportional to 1,512,622.90, 2,119,246.70 and 1,512,622.90

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Solution

The fourth proportional to 1,512,622.90, 2,119,246.70 and 1,512,622.90 is: 2,119,246.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,512,622.90 : 2,119,246.70 = 1,512,622.90 : x
  2. Step 2: Convert to fraction form
    1,512,622.90/2,119,246.70 = 1,512,622.90/x
  3. Step 3: Cross multiply
    1,512,622.90x = 2,119,246.70 × 1,512,622.90
  4. Step 4: Simplify right side
    1,512,622.90x = 3,205,621,089,169.43
  5. Step 5: Solve for x
    x = 3,205,621,089,169.43/1,512,622.90
  6. Step 6: Final answer
    x = 2,119,246.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.