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Finding the Fourth Proportional to 1,278,860.94, 1,764,828.27 and 705,901.23

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Solution

The fourth proportional to 1,278,860.94, 1,764,828.27 and 705,901.23 is: 974,143.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,860.94 : 1,764,828.27 = 705,901.23 : x
  2. Step 2: Convert to fraction form
    1,278,860.94/1,764,828.27 = 705,901.23/x
  3. Step 3: Cross multiply
    1,278,860.94x = 1,764,828.27 × 705,901.23
  4. Step 4: Simplify right side
    1,278,860.94x = 1,245,794,446,531.77
  5. Step 5: Solve for x
    x = 1,245,794,446,531.77/1,278,860.94
  6. Step 6: Final answer
    x = 974,143.79

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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.