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Finding the Fourth Proportional to 279,334.83, 385,490.81 and 158,481.21

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Solution

The fourth proportional to 279,334.83, 385,490.81 and 158,481.21 is: 218,709.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,334.83 : 385,490.81 = 158,481.21 : x
  2. Step 2: Convert to fraction form
    279,334.83/385,490.81 = 158,481.21/x
  3. Step 3: Cross multiply
    279,334.83x = 385,490.81 × 158,481.21
  4. Step 4: Simplify right side
    279,334.83x = 61,093,049,220.27
  5. Step 5: Solve for x
    x = 61,093,049,220.27/279,334.83
  6. Step 6: Final answer
    x = 218,709.03

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1.5x scale

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.