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Finding the Fourth Proportional to 479,940.78, 719,462.43 and 213,556.62

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Solution

The fourth proportional to 479,940.78, 719,462.43 and 213,556.62 is: 320,135.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,940.78 : 719,462.43 = 213,556.62 : x
  2. Step 2: Convert to fraction form
    479,940.78/719,462.43 = 213,556.62/x
  3. Step 3: Cross multiply
    479,940.78x = 719,462.43 × 213,556.62
  4. Step 4: Simplify right side
    479,940.78x = 153,645,964,767.79
  5. Step 5: Solve for x
    x = 153,645,964,767.79/479,940.78
  6. Step 6: Final answer
    x = 320,135.26

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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.