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Finding the Fourth Proportional to 2,219.63, 3,330.09 and 659.64

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Solution

The fourth proportional to 2,219.63, 3,330.09 and 659.64 is: 989.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,219.63 : 3,330.09 = 659.64 : x
  2. Step 2: Convert to fraction form
    2,219.63/3,330.09 = 659.64/x
  3. Step 3: Cross multiply
    2,219.63x = 3,330.09 × 659.64
  4. Step 4: Simplify right side
    2,219.63x = 2,196,660.57
  5. Step 5: Solve for x
    x = 2,196,660.57/2,219.63
  6. Step 6: Final answer
    x = 989.65

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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.