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Finding the Fourth Proportional to 683, 1,024.90 and 272.32

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Solution

The fourth proportional to 683, 1,024.90 and 272.32 is: 408.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    683 : 1,024.90 = 272.32 : x
  2. Step 2: Convert to fraction form
    683/1,024.90 = 272.32/x
  3. Step 3: Cross multiply
    683x = 1,024.90 × 272.32
  4. Step 4: Simplify right side
    683x = 279,100.77
  5. Step 5: Solve for x
    x = 279,100.77/683
  6. Step 6: Final answer
    x = 408.64

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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.