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Finding the Fourth Proportional to 221,443.20, 331,819.20 and 191,721.60

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Solution

The fourth proportional to 221,443.20, 331,819.20 and 191,721.60 is: 287,283.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,443.20 : 331,819.20 = 191,721.60 : x
  2. Step 2: Convert to fraction form
    221,443.20/331,819.20 = 191,721.60/x
  3. Step 3: Cross multiply
    221,443.20x = 331,819.20 × 191,721.60
  4. Step 4: Simplify right side
    221,443.20x = 63,616,907,934.72
  5. Step 5: Solve for x
    x = 63,616,907,934.72/221,443.20
  6. Step 6: Final answer
    x = 287,283.19

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1.5x scale

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.