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Finding the Fourth Proportional to 308,929.80, 426,359.04 and 188,141.88

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Solution

The fourth proportional to 308,929.80, 426,359.04 and 188,141.88 is: 259,657.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,929.80 : 426,359.04 = 188,141.88 : x
  2. Step 2: Convert to fraction form
    308,929.80/426,359.04 = 188,141.88/x
  3. Step 3: Cross multiply
    308,929.80x = 426,359.04 × 188,141.88
  4. Step 4: Simplify right side
    308,929.80x = 80,215,991,340.60
  5. Step 5: Solve for x
    x = 80,215,991,340.60/308,929.80
  6. Step 6: Final answer
    x = 259,657.67

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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.