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Finding the Fourth Proportional to 279,517.13, 385,738.32 and 158,662.15

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Solution

The fourth proportional to 279,517.13, 385,738.32 and 158,662.15 is: 218,956.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,517.13 : 385,738.32 = 158,662.15 : x
  2. Step 2: Convert to fraction form
    279,517.13/385,738.32 = 158,662.15/x
  3. Step 3: Cross multiply
    279,517.13x = 385,738.32 × 158,662.15
  4. Step 4: Simplify right side
    279,517.13x = 61,202,071,188.59
  5. Step 5: Solve for x
    x = 61,202,071,188.59/279,517.13
  6. Step 6: Final answer
    x = 218,956.42

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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.