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Finding the Fourth Proportional to 320,007.78, 479,992.11 and 133,020.90

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Solution

The fourth proportional to 320,007.78, 479,992.11 and 133,020.90 is: 199,523.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,007.78 : 479,992.11 = 133,020.90 : x
  2. Step 2: Convert to fraction form
    320,007.78/479,992.11 = 133,020.90/x
  3. Step 3: Cross multiply
    320,007.78x = 479,992.11 × 133,020.90
  4. Step 4: Simplify right side
    320,007.78x = 63,848,982,465.10
  5. Step 5: Solve for x
    x = 63,848,982,465.10/320,007.78
  6. Step 6: Final answer
    x = 199,523.22

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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.