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Finding the Fourth Proportional to 619,888.13, 927,708.96 and 430,561.97

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Solution

The fourth proportional to 619,888.13, 927,708.96 and 430,561.97 is: 644,368.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,888.13 : 927,708.96 = 430,561.97 : x
  2. Step 2: Convert to fraction form
    619,888.13/927,708.96 = 430,561.97/x
  3. Step 3: Cross multiply
    619,888.13x = 927,708.96 × 430,561.97
  4. Step 4: Simplify right side
    619,888.13x = 399,436,197,404.25
  5. Step 5: Solve for x
    x = 399,436,197,404.25/619,888.13
  6. Step 6: Final answer
    x = 644,368.20

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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.