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Finding the Fourth Proportional to 613,111.36, 919,398.92 and 309,318.60

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Solution

The fourth proportional to 613,111.36, 919,398.92 and 309,318.60 is: 463,842.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,111.36 : 919,398.92 = 309,318.60 : x
  2. Step 2: Convert to fraction form
    613,111.36/919,398.92 = 309,318.60/x
  3. Step 3: Cross multiply
    613,111.36x = 919,398.92 × 309,318.60
  4. Step 4: Simplify right side
    613,111.36x = 284,387,185,245.38
  5. Step 5: Solve for x
    x = 284,387,185,245.38/613,111.36
  6. Step 6: Final answer
    x = 463,842.63

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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.