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Finding the Fourth Proportional to 1,433,867.81, 1,978,563.11 and 853,107.93

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Solution

The fourth proportional to 1,433,867.81, 1,978,563.11 and 853,107.93 is: 1,177,185.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,433,867.81 : 1,978,563.11 = 853,107.93 : x
  2. Step 2: Convert to fraction form
    1,433,867.81/1,978,563.11 = 853,107.93/x
  3. Step 3: Cross multiply
    1,433,867.81x = 1,978,563.11 × 853,107.93
  4. Step 4: Simplify right side
    1,433,867.81x = 1,687,927,874,880.92
  5. Step 5: Solve for x
    x = 1,687,927,874,880.92/1,433,867.81
  6. Step 6: Final answer
    x = 1,177,185.14

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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.