Home / 2,219.79-3,330.35-659.85

Finding the Fourth Proportional to 2,219.79, 3,330.35 and 659.85

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Solution

The fourth proportional to 2,219.79, 3,330.35 and 659.85 is: 989.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,219.79 : 3,330.35 = 659.85 : x
  2. Step 2: Convert to fraction form
    2,219.79/3,330.35 = 659.85/x
  3. Step 3: Cross multiply
    2,219.79x = 3,330.35 × 659.85
  4. Step 4: Simplify right side
    2,219.79x = 2,197,518.13
  5. Step 5: Solve for x
    x = 2,197,518.13/2,219.79
  6. Step 6: Final answer
    x = 989.97

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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.