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Finding the Fourth Proportional to 1,282.23, 1,921.97 and 622.73

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Solution

The fourth proportional to 1,282.23, 1,921.97 and 622.73 is: 933.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282.23 : 1,921.97 = 622.73 : x
  2. Step 2: Convert to fraction form
    1,282.23/1,921.97 = 622.73/x
  3. Step 3: Cross multiply
    1,282.23x = 1,921.97 × 622.73
  4. Step 4: Simplify right side
    1,282.23x = 1,196,855.65
  5. Step 5: Solve for x
    x = 1,196,855.65/1,282.23
  6. Step 6: Final answer
    x = 933.42

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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.