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Finding the Fourth Proportional to 822,663.20, 1,232,245.20 and 682,695.20

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Solution

The fourth proportional to 822,663.20, 1,232,245.20 and 682,695.20 is: 1,022,590.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    822,663.20 : 1,232,245.20 = 682,695.20 : x
  2. Step 2: Convert to fraction form
    822,663.20/1,232,245.20 = 682,695.20/x
  3. Step 3: Cross multiply
    822,663.20x = 1,232,245.20 × 682,695.20
  4. Step 4: Simplify right side
    822,663.20x = 841,247,883,263.04
  5. Step 5: Solve for x
    x = 841,247,883,263.04/822,663.20
  6. Step 6: Final answer
    x = 1,022,590.88

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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.