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Finding the Fourth Proportional to 1,396,728.26, 1,927,519.23 and 784,844.34

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Solution

The fourth proportional to 1,396,728.26, 1,927,519.23 and 784,844.34 is: 1,083,104.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,396,728.26 : 1,927,519.23 = 784,844.34 : x
  2. Step 2: Convert to fraction form
    1,396,728.26/1,927,519.23 = 784,844.34/x
  3. Step 3: Cross multiply
    1,396,728.26x = 1,927,519.23 × 784,844.34
  4. Step 4: Simplify right side
    1,396,728.26x = 1,512,802,553,621.63
  5. Step 5: Solve for x
    x = 1,512,802,553,621.63/1,396,728.26
  6. Step 6: Final answer
    x = 1,083,104.42

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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.