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Finding the Fourth Proportional to 683.17, 1,023.79 and 386.41

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Solution

The fourth proportional to 683.17, 1,023.79 and 386.41 is: 579.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.17 : 1,023.79 = 386.41 : x
  2. Step 2: Convert to fraction form
    683.17/1,023.79 = 386.41/x
  3. Step 3: Cross multiply
    683.17x = 1,023.79 × 386.41
  4. Step 4: Simplify right side
    683.17x = 395,602.69
  5. Step 5: Solve for x
    x = 395,602.69/683.17
  6. Step 6: Final answer
    x = 579.07

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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.