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Finding the Fourth Proportional to 683.06, 1,022.25 and 422.96

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Solution

The fourth proportional to 683.06, 1,022.25 and 422.96 is: 632.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.06 : 1,022.25 = 422.96 : x
  2. Step 2: Convert to fraction form
    683.06/1,022.25 = 422.96/x
  3. Step 3: Cross multiply
    683.06x = 1,022.25 × 422.96
  4. Step 4: Simplify right side
    683.06x = 432,370.86
  5. Step 5: Solve for x
    x = 432,370.86/683.06
  6. Step 6: Final answer
    x = 632.99

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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.