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Finding the Fourth Proportional to 2,219.42, 3,329.79 and 659.47

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Solution

The fourth proportional to 2,219.42, 3,329.79 and 659.47 is: 989.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,219.42 : 3,329.79 = 659.47 : x
  2. Step 2: Convert to fraction form
    2,219.42/3,329.79 = 659.47/x
  3. Step 3: Cross multiply
    2,219.42x = 3,329.79 × 659.47
  4. Step 4: Simplify right side
    2,219.42x = 2,195,896.61
  5. Step 5: Solve for x
    x = 2,195,896.61/2,219.42
  6. Step 6: Final answer
    x = 989.40

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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.