Home / 820,720.78-1,231,126.07-340,997.11

Finding the Fourth Proportional to 820,720.78, 1,231,126.07 and 340,997.11

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Solution

The fourth proportional to 820,720.78, 1,231,126.07 and 340,997.11 is: 511,514.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,720.78 : 1,231,126.07 = 340,997.11 : x
  2. Step 2: Convert to fraction form
    820,720.78/1,231,126.07 = 340,997.11/x
  3. Step 3: Cross multiply
    820,720.78x = 1,231,126.07 × 340,997.11
  4. Step 4: Simplify right side
    820,720.78x = 419,810,427,132.86
  5. Step 5: Solve for x
    x = 419,810,427,132.86/820,720.78
  6. Step 6: Final answer
    x = 511,514.32

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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.