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Finding the Fourth Proportional to 1,934,789.60, 2,902,184.40 and 978,195.80

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Solution

The fourth proportional to 1,934,789.60, 2,902,184.40 and 978,195.80 is: 1,467,293.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,934,789.60 : 2,902,184.40 = 978,195.80 : x
  2. Step 2: Convert to fraction form
    1,934,789.60/2,902,184.40 = 978,195.80/x
  3. Step 3: Cross multiply
    1,934,789.60x = 2,902,184.40 × 978,195.80
  4. Step 4: Simplify right side
    1,934,789.60x = 2,838,904,590,905.52
  5. Step 5: Solve for x
    x = 2,838,904,590,905.52/1,934,789.60
  6. Step 6: Final answer
    x = 1,467,293.70

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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.