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Finding the Fourth Proportional to 289,693.80, 434,540.70 and 165,277.80

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Solution

The fourth proportional to 289,693.80, 434,540.70 and 165,277.80 is: 247,916.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,693.80 : 434,540.70 = 165,277.80 : x
  2. Step 2: Convert to fraction form
    289,693.80/434,540.70 = 165,277.80/x
  3. Step 3: Cross multiply
    289,693.80x = 434,540.70 × 165,277.80
  4. Step 4: Simplify right side
    289,693.80x = 71,819,930,906.46
  5. Step 5: Solve for x
    x = 71,819,930,906.46/289,693.80
  6. Step 6: Final answer
    x = 247,916.70

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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.