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Finding the Fourth Proportional to 313,961.20, 469,866.60 and 189,391.60

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Solution

The fourth proportional to 313,961.20, 469,866.60 and 189,391.60 is: 283,438.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,961.20 : 469,866.60 = 189,391.60 : x
  2. Step 2: Convert to fraction form
    313,961.20/469,866.60 = 189,391.60/x
  3. Step 3: Cross multiply
    313,961.20x = 469,866.60 × 189,391.60
  4. Step 4: Simplify right side
    313,961.20x = 88,988,787,160.56
  5. Step 5: Solve for x
    x = 88,988,787,160.56/313,961.20
  6. Step 6: Final answer
    x = 283,438.80

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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.