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Finding the Fourth Proportional to 253,455.84, 379,867.56 and 221,790.60

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Solution

The fourth proportional to 253,455.84, 379,867.56 and 221,790.60 is: 332,409.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,455.84 : 379,867.56 = 221,790.60 : x
  2. Step 2: Convert to fraction form
    253,455.84/379,867.56 = 221,790.60/x
  3. Step 3: Cross multiply
    253,455.84x = 379,867.56 × 221,790.60
  4. Step 4: Simplify right side
    253,455.84x = 84,251,054,052.94
  5. Step 5: Solve for x
    x = 84,251,054,052.94/253,455.84
  6. Step 6: Final answer
    x = 332,409.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.