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Finding the Fourth Proportional to 1,278,681.22, 1,764,571.39 and 705,721.38

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Solution

The fourth proportional to 1,278,681.22, 1,764,571.39 and 705,721.38 is: 973,890.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,681.22 : 1,764,571.39 = 705,721.38 : x
  2. Step 2: Convert to fraction form
    1,278,681.22/1,764,571.39 = 705,721.38/x
  3. Step 3: Cross multiply
    1,278,681.22x = 1,764,571.39 × 705,721.38
  4. Step 4: Simplify right side
    1,278,681.22x = 1,245,295,752,047.55
  5. Step 5: Solve for x
    x = 1,245,295,752,047.55/1,278,681.22
  6. Step 6: Final answer
    x = 973,890.70

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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.