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Finding the Fourth Proportional to 331,968.78, 458,115.75 and 188,728.79

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Solution

The fourth proportional to 331,968.78, 458,115.75 and 188,728.79 is: 260,445.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,968.78 : 458,115.75 = 188,728.79 : x
  2. Step 2: Convert to fraction form
    331,968.78/458,115.75 = 188,728.79/x
  3. Step 3: Cross multiply
    331,968.78x = 458,115.75 × 188,728.79
  4. Step 4: Simplify right side
    331,968.78x = 86,459,628,886.86
  5. Step 5: Solve for x
    x = 86,459,628,886.86/331,968.78
  6. Step 6: Final answer
    x = 260,445.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.