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Finding the Fourth Proportional to 812,991.56, 1,219,229 and 759,921.30

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Solution

The fourth proportional to 812,991.56, 1,219,229 and 759,921.30 is: 1,139,640.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,991.56 : 1,219,229 = 759,921.30 : x
  2. Step 2: Convert to fraction form
    812,991.56/1,219,229 = 759,921.30/x
  3. Step 3: Cross multiply
    812,991.56x = 1,219,229 × 759,921.30
  4. Step 4: Simplify right side
    812,991.56x = 926,518,086,677.70
  5. Step 5: Solve for x
    x = 926,518,086,677.70/812,991.56
  6. Step 6: Final answer
    x = 1,139,640.47

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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.