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Finding the Fourth Proportional to 683.91, 1,025.10 and 272.48

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Solution

The fourth proportional to 683.91, 1,025.10 and 272.48 is: 408.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.91 : 1,025.10 = 272.48 : x
  2. Step 2: Convert to fraction form
    683.91/1,025.10 = 272.48/x
  3. Step 3: Cross multiply
    683.91x = 1,025.10 × 272.48
  4. Step 4: Simplify right side
    683.91x = 279,314.12
  5. Step 5: Solve for x
    x = 279,314.12/683.91
  6. Step 6: Final answer
    x = 408.41

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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.