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Finding the Fourth Proportional to 220,890.60, 331,335.90 and 196,396.20

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Solution

The fourth proportional to 220,890.60, 331,335.90 and 196,396.20 is: 294,594.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,890.60 : 331,335.90 = 196,396.20 : x
  2. Step 2: Convert to fraction form
    220,890.60/331,335.90 = 196,396.20/x
  3. Step 3: Cross multiply
    220,890.60x = 331,335.90 × 196,396.20
  4. Step 4: Simplify right side
    220,890.60x = 65,073,111,683.58
  5. Step 5: Solve for x
    x = 65,073,111,683.58/220,890.60
  6. Step 6: Final answer
    x = 294,594.30

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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.