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Finding the Fourth Proportional to 1,279,380, 1,765,699.92 and 742,836

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Solution

The fourth proportional to 1,279,380, 1,765,699.92 and 742,836 is: 1,025,203.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,380 : 1,765,699.92 = 742,836 : x
  2. Step 2: Convert to fraction form
    1,279,380/1,765,699.92 = 742,836/x
  3. Step 3: Cross multiply
    1,279,380x = 1,765,699.92 × 742,836
  4. Step 4: Simplify right side
    1,279,380x = 1,311,625,465,773.12
  5. Step 5: Solve for x
    x = 1,311,625,465,773.12/1,279,380
  6. Step 6: Final answer
    x = 1,025,203.98

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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.