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Finding the Fourth Proportional to 1,259,781.05, 1,890,455.25 and 511,827.05

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Solution

The fourth proportional to 1,259,781.05, 1,890,455.25 and 511,827.05 is: 768,058.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,259,781.05 : 1,890,455.25 = 511,827.05 : x
  2. Step 2: Convert to fraction form
    1,259,781.05/1,890,455.25 = 511,827.05/x
  3. Step 3: Cross multiply
    1,259,781.05x = 1,890,455.25 × 511,827.05
  4. Step 4: Simplify right side
    1,259,781.05x = 967,586,140,410.00
  5. Step 5: Solve for x
    x = 967,586,140,410.00/1,259,781.05
  6. Step 6: Final answer
    x = 768,058.97

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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.