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Finding the Fourth Proportional to 1,261,979.82, 1,741,684.95 and 718,247.88

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Solution

The fourth proportional to 1,261,979.82, 1,741,684.95 and 718,247.88 is: 991,269.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261,979.82 : 1,741,684.95 = 718,247.88 : x
  2. Step 2: Convert to fraction form
    1,261,979.82/1,741,684.95 = 718,247.88/x
  3. Step 3: Cross multiply
    1,261,979.82x = 1,741,684.95 × 718,247.88
  4. Step 4: Simplify right side
    1,261,979.82x = 1,250,961,522,965.41
  5. Step 5: Solve for x
    x = 1,250,961,522,965.41/1,261,979.82
  6. Step 6: Final answer
    x = 991,269.04

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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.