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Finding the Fourth Proportional to 683.85, 1,025.27 and 423.46

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Solution

The fourth proportional to 683.85, 1,025.27 and 423.46 is: 634.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.85 : 1,025.27 = 423.46 : x
  2. Step 2: Convert to fraction form
    683.85/1,025.27 = 423.46/x
  3. Step 3: Cross multiply
    683.85x = 1,025.27 × 423.46
  4. Step 4: Simplify right side
    683.85x = 434,160.83
  5. Step 5: Solve for x
    x = 434,160.83/683.85
  6. Step 6: Final answer
    x = 634.88

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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.