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Finding the Fourth Proportional to 813,810.56, 1,123,053.12 and 451,234.64

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Solution

The fourth proportional to 813,810.56, 1,123,053.12 and 451,234.64 is: 622,700.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,810.56 : 1,123,053.12 = 451,234.64 : x
  2. Step 2: Convert to fraction form
    813,810.56/1,123,053.12 = 451,234.64/x
  3. Step 3: Cross multiply
    813,810.56x = 1,123,053.12 × 451,234.64
  4. Step 4: Simplify right side
    813,810.56x = 506,760,470,304.08
  5. Step 5: Solve for x
    x = 506,760,470,304.08/813,810.56
  6. Step 6: Final answer
    x = 622,700.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.