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Finding the Fourth Proportional to 1,327,257, 1,990,892.79 and 329,985

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Solution

The fourth proportional to 1,327,257, 1,990,892.79 and 329,985 is: 494,979.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327,257 : 1,990,892.79 = 329,985 : x
  2. Step 2: Convert to fraction form
    1,327,257/1,990,892.79 = 329,985/x
  3. Step 3: Cross multiply
    1,327,257x = 1,990,892.79 × 329,985
  4. Step 4: Simplify right side
    1,327,257x = 656,964,757,308.15
  5. Step 5: Solve for x
    x = 656,964,757,308.15/1,327,257
  6. Step 6: Final answer
    x = 494,979.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.