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Finding the Fourth Proportional to 1,261,839.82, 1,741,491.76 and 718,107.88

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Solution

The fourth proportional to 1,261,839.82, 1,741,491.76 and 718,107.88 is: 991,075.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261,839.82 : 1,741,491.76 = 718,107.88 : x
  2. Step 2: Convert to fraction form
    1,261,839.82/1,741,491.76 = 718,107.88/x
  3. Step 3: Cross multiply
    1,261,839.82x = 1,741,491.76 × 718,107.88
  4. Step 4: Simplify right side
    1,261,839.82x = 1,250,578,955,811.07
  5. Step 5: Solve for x
    x = 1,250,578,955,811.07/1,261,839.82
  6. Step 6: Final answer
    x = 991,075.84

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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.