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Finding the Fourth Proportional to 351,956.16, 485,693.16 and 198,991.71

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Solution

The fourth proportional to 351,956.16, 485,693.16 and 198,991.71 is: 274,604.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,956.16 : 485,693.16 = 198,991.71 : x
  2. Step 2: Convert to fraction form
    351,956.16/485,693.16 = 198,991.71/x
  3. Step 3: Cross multiply
    351,956.16x = 485,693.16 × 198,991.71
  4. Step 4: Simplify right side
    351,956.16x = 96,648,912,443.70
  5. Step 5: Solve for x
    x = 96,648,912,443.70/351,956.16
  6. Step 6: Final answer
    x = 274,604.97

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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.