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Finding the Fourth Proportional to 1,278,619.88, 1,764,481.62 and 697,838.29

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Solution

The fourth proportional to 1,278,619.88, 1,764,481.62 and 697,838.29 is: 963,009.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,619.88 : 1,764,481.62 = 697,838.29 : x
  2. Step 2: Convert to fraction form
    1,278,619.88/1,764,481.62 = 697,838.29/x
  3. Step 3: Cross multiply
    1,278,619.88x = 1,764,481.62 × 697,838.29
  4. Step 4: Simplify right side
    1,278,619.88x = 1,231,322,834,642.92
  5. Step 5: Solve for x
    x = 1,231,322,834,642.92/1,278,619.88
  6. Step 6: Final answer
    x = 963,009.30

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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.