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Finding the Fourth Proportional to 1,939,793.70, 2,912,800.95 and 1,311,492.90

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Solution

The fourth proportional to 1,939,793.70, 2,912,800.95 and 1,311,492.90 is: 1,969,342.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939,793.70 : 2,912,800.95 = 1,311,492.90 : x
  2. Step 2: Convert to fraction form
    1,939,793.70/2,912,800.95 = 1,311,492.90/x
  3. Step 3: Cross multiply
    1,939,793.70x = 2,912,800.95 × 1,311,492.90
  4. Step 4: Simplify right side
    1,939,793.70x = 3,820,117,765,038.26
  5. Step 5: Solve for x
    x = 3,820,117,765,038.26/1,939,793.70
  6. Step 6: Final answer
    x = 1,969,342.29

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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.