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Finding the Fourth Proportional to 276,330, 381,335.40 and 157,098

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Solution

The fourth proportional to 276,330, 381,335.40 and 157,098 is: 216,795.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,330 : 381,335.40 = 157,098 : x
  2. Step 2: Convert to fraction form
    276,330/381,335.40 = 157,098/x
  3. Step 3: Cross multiply
    276,330x = 381,335.40 × 157,098
  4. Step 4: Simplify right side
    276,330x = 59,907,028,669.20
  5. Step 5: Solve for x
    x = 59,907,028,669.20/276,330
  6. Step 6: Final answer
    x = 216,795.24

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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.