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Finding the Fourth Proportional to 1,261,764.91, 1,741,242.66 and 717,900.69

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Solution

The fourth proportional to 1,261,764.91, 1,741,242.66 and 717,900.69 is: 990,706.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261,764.91 : 1,741,242.66 = 717,900.69 : x
  2. Step 2: Convert to fraction form
    1,261,764.91/1,741,242.66 = 717,900.69/x
  3. Step 3: Cross multiply
    1,261,764.91x = 1,741,242.66 × 717,900.69
  4. Step 4: Simplify right side
    1,261,764.91x = 1,250,039,307,071.44
  5. Step 5: Solve for x
    x = 1,250,039,307,071.44/1,261,764.91
  6. Step 6: Final answer
    x = 990,706.98

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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.