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Finding the Fourth Proportional to 289,910.04, 434,906.06 and 90,250.58

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Solution

The fourth proportional to 289,910.04, 434,906.06 and 90,250.58 is: 135,388.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,910.04 : 434,906.06 = 90,250.58 : x
  2. Step 2: Convert to fraction form
    289,910.04/434,906.06 = 90,250.58/x
  3. Step 3: Cross multiply
    289,910.04x = 434,906.06 × 90,250.58
  4. Step 4: Simplify right side
    289,910.04x = 39,250,521,534.73
  5. Step 5: Solve for x
    x = 39,250,521,534.73/289,910.04
  6. Step 6: Final answer
    x = 135,388.62

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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.