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Finding the Fourth Proportional to 356,162.21, 491,529.73 and 203,203.78

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Solution

The fourth proportional to 356,162.21, 491,529.73 and 203,203.78 is: 280,435.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,162.21 : 491,529.73 = 203,203.78 : x
  2. Step 2: Convert to fraction form
    356,162.21/491,529.73 = 203,203.78/x
  3. Step 3: Cross multiply
    356,162.21x = 491,529.73 × 203,203.78
  4. Step 4: Simplify right side
    356,162.21x = 99,880,697,357.09
  5. Step 5: Solve for x
    x = 99,880,697,357.09/356,162.21
  6. Step 6: Final answer
    x = 280,435.97

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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.