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Finding the Fourth Proportional to 613,255.72, 919,887.66 and 213,895

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Solution

The fourth proportional to 613,255.72, 919,887.66 and 213,895 is: 320,843.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,255.72 : 919,887.66 = 213,895 : x
  2. Step 2: Convert to fraction form
    613,255.72/919,887.66 = 213,895/x
  3. Step 3: Cross multiply
    613,255.72x = 919,887.66 × 213,895
  4. Step 4: Simplify right side
    613,255.72x = 196,759,371,035.70
  5. Step 5: Solve for x
    x = 196,759,371,035.70/613,255.72
  6. Step 6: Final answer
    x = 320,843.92

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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.