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Finding the Fourth Proportional to 221,858.10, 332,787.15 and 208,736.10

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Solution

The fourth proportional to 221,858.10, 332,787.15 and 208,736.10 is: 313,104.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,858.10 : 332,787.15 = 208,736.10 : x
  2. Step 2: Convert to fraction form
    221,858.10/332,787.15 = 208,736.10/x
  3. Step 3: Cross multiply
    221,858.10x = 332,787.15 × 208,736.10
  4. Step 4: Simplify right side
    221,858.10x = 69,464,691,821.12
  5. Step 5: Solve for x
    x = 69,464,691,821.12/221,858.10
  6. Step 6: Final answer
    x = 313,104.15

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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.