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Finding the Fourth Proportional to 1,439,693.79, 1,986,791.03 and 819,468.67

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Solution

The fourth proportional to 1,439,693.79, 1,986,791.03 and 819,468.67 is: 1,130,874.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439,693.79 : 1,986,791.03 = 819,468.67 : x
  2. Step 2: Convert to fraction form
    1,439,693.79/1,986,791.03 = 819,468.67/x
  3. Step 3: Cross multiply
    1,439,693.79x = 1,986,791.03 × 819,468.67
  4. Step 4: Simplify right side
    1,439,693.79x = 1,628,113,002,922.03
  5. Step 5: Solve for x
    x = 1,628,113,002,922.03/1,439,693.79
  6. Step 6: Final answer
    x = 1,130,874.51

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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.