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Finding the Fourth Proportional to 220,219.44, 330,225 and 85,346.64

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Solution

The fourth proportional to 220,219.44, 330,225 and 85,346.64 is: 127,979.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,219.44 : 330,225 = 85,346.64 : x
  2. Step 2: Convert to fraction form
    220,219.44/330,225 = 85,346.64/x
  3. Step 3: Cross multiply
    220,219.44x = 330,225 × 85,346.64
  4. Step 4: Simplify right side
    220,219.44x = 28,183,594,194
  5. Step 5: Solve for x
    x = 28,183,594,194/220,219.44
  6. Step 6: Final answer
    x = 127,979.59

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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.