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Finding the Fourth Proportional to 1,261,690.95, 1,741,111.04 and 717,815.03

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Solution

The fourth proportional to 1,261,690.95, 1,741,111.04 and 717,815.03 is: 990,571.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261,690.95 : 1,741,111.04 = 717,815.03 : x
  2. Step 2: Convert to fraction form
    1,261,690.95/1,741,111.04 = 717,815.03/x
  3. Step 3: Cross multiply
    1,261,690.95x = 1,741,111.04 × 717,815.03
  4. Step 4: Simplify right side
    1,261,690.95x = 1,249,795,673,029.08
  5. Step 5: Solve for x
    x = 1,249,795,673,029.08/1,261,690.95
  6. Step 6: Final answer
    x = 990,571.96

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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.