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Finding the Fourth Proportional to 683.49, 1,023.75 and 423.56

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Solution

The fourth proportional to 683.49, 1,023.75 and 423.56 is: 634.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.49 : 1,023.75 = 423.56 : x
  2. Step 2: Convert to fraction form
    683.49/1,023.75 = 423.56/x
  3. Step 3: Cross multiply
    683.49x = 1,023.75 × 423.56
  4. Step 4: Simplify right side
    683.49x = 433,619.55
  5. Step 5: Solve for x
    x = 433,619.55/683.49
  6. Step 6: Final answer
    x = 634.42

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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.