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Finding the Fourth Proportional to 683.72, 1,025.58 and 394.44

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Solution

The fourth proportional to 683.72, 1,025.58 and 394.44 is: 591.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.72 : 1,025.58 = 394.44 : x
  2. Step 2: Convert to fraction form
    683.72/1,025.58 = 394.44/x
  3. Step 3: Cross multiply
    683.72x = 1,025.58 × 394.44
  4. Step 4: Simplify right side
    683.72x = 404,529.78
  5. Step 5: Solve for x
    x = 404,529.78/683.72
  6. Step 6: Final answer
    x = 591.66

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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.