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Finding the Fourth Proportional to 1,296,997.98, 1,789,342.80 and 866,596.38

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Solution

The fourth proportional to 1,296,997.98, 1,789,342.80 and 866,596.38 is: 1,195,559.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296,997.98 : 1,789,342.80 = 866,596.38 : x
  2. Step 2: Convert to fraction form
    1,296,997.98/1,789,342.80 = 866,596.38/x
  3. Step 3: Cross multiply
    1,296,997.98x = 1,789,342.80 × 866,596.38
  4. Step 4: Simplify right side
    1,296,997.98x = 1,550,637,993,059.06
  5. Step 5: Solve for x
    x = 1,550,637,993,059.06/1,296,997.98
  6. Step 6: Final answer
    x = 1,195,559.30

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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.