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Finding the Fourth Proportional to 289,709.70, 434,564.55 and 132,245.70

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Solution

The fourth proportional to 289,709.70, 434,564.55 and 132,245.70 is: 198,368.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,709.70 : 434,564.55 = 132,245.70 : x
  2. Step 2: Convert to fraction form
    289,709.70/434,564.55 = 132,245.70/x
  3. Step 3: Cross multiply
    289,709.70x = 434,564.55 × 132,245.70
  4. Step 4: Simplify right side
    289,709.70x = 57,469,293,109.94
  5. Step 5: Solve for x
    x = 57,469,293,109.94/289,709.70
  6. Step 6: Final answer
    x = 198,368.55

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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.