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Finding the Fourth Proportional to 1,279,383, 1,765,704.06 and 742,839

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Solution

The fourth proportional to 1,279,383, 1,765,704.06 and 742,839 is: 1,025,208.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,383 : 1,765,704.06 = 742,839 : x
  2. Step 2: Convert to fraction form
    1,279,383/1,765,704.06 = 742,839/x
  3. Step 3: Cross multiply
    1,279,383x = 1,765,704.06 × 742,839
  4. Step 4: Simplify right side
    1,279,383x = 1,311,633,838,226.34
  5. Step 5: Solve for x
    x = 1,311,633,838,226.34/1,279,383
  6. Step 6: Final answer
    x = 1,025,208.12

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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.