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Finding the Fourth Proportional to 1,278,849.94, 1,764,813.09 and 705,890.23

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Solution

The fourth proportional to 1,278,849.94, 1,764,813.09 and 705,890.23 is: 974,128.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,849.94 : 1,764,813.09 = 705,890.23 : x
  2. Step 2: Convert to fraction form
    1,278,849.94/1,764,813.09 = 705,890.23/x
  3. Step 3: Cross multiply
    1,278,849.94x = 1,764,813.09 × 705,890.23
  4. Step 4: Simplify right side
    1,278,849.94x = 1,245,764,318,007.11
  5. Step 5: Solve for x
    x = 1,245,764,318,007.11/1,278,849.94
  6. Step 6: Final answer
    x = 974,128.61

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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.