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Finding the Fourth Proportional to 221,447.20, 331,825.20 and 191,725.60

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Solution

The fourth proportional to 221,447.20, 331,825.20 and 191,725.60 is: 287,289.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,447.20 : 331,825.20 = 191,725.60 : x
  2. Step 2: Convert to fraction form
    221,447.20/331,825.20 = 191,725.60/x
  3. Step 3: Cross multiply
    221,447.20x = 331,825.20 × 191,725.60
  4. Step 4: Simplify right side
    221,447.20x = 63,619,385,565.12
  5. Step 5: Solve for x
    x = 63,619,385,565.12/221,447.20
  6. Step 6: Final answer
    x = 287,289.18

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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.