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Finding the Fourth Proportional to 220,611.88, 330,917.86 and 154,181.76

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Solution

The fourth proportional to 220,611.88, 330,917.86 and 154,181.76 is: 231,272.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,611.88 : 330,917.86 = 154,181.76 : x
  2. Step 2: Convert to fraction form
    220,611.88/330,917.86 = 154,181.76/x
  3. Step 3: Cross multiply
    220,611.88x = 330,917.86 × 154,181.76
  4. Step 4: Simplify right side
    220,611.88x = 51,021,498,070.23
  5. Step 5: Solve for x
    x = 51,021,498,070.23/220,611.88
  6. Step 6: Final answer
    x = 231,272.67

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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.