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Finding the Fourth Proportional to 613,245.88, 920,021.91 and 213,892.39

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Solution

The fourth proportional to 613,245.88, 920,021.91 and 213,892.39 is: 320,891.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,245.88 : 920,021.91 = 213,892.39 : x
  2. Step 2: Convert to fraction form
    613,245.88/920,021.91 = 213,892.39/x
  3. Step 3: Cross multiply
    613,245.88x = 920,021.91 × 213,892.39
  4. Step 4: Simplify right side
    613,245.88x = 196,785,685,182.27
  5. Step 5: Solve for x
    x = 196,785,685,182.27/613,245.88
  6. Step 6: Final answer
    x = 320,891.98

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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.