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Finding the Fourth Proportional to 683.71, 1,022.97 and 419.22

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Solution

The fourth proportional to 683.71, 1,022.97 and 419.22 is: 627.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.71 : 1,022.97 = 419.22 : x
  2. Step 2: Convert to fraction form
    683.71/1,022.97 = 419.22/x
  3. Step 3: Cross multiply
    683.71x = 1,022.97 × 419.22
  4. Step 4: Simplify right side
    683.71x = 428,849.48
  5. Step 5: Solve for x
    x = 428,849.48/683.71
  6. Step 6: Final answer
    x = 627.24

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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.