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Finding the Fourth Proportional to 683.34, 1,023.79 and 317.62

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Solution

The fourth proportional to 683.34, 1,023.79 and 317.62 is: 475.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.34 : 1,023.79 = 317.62 : x
  2. Step 2: Convert to fraction form
    683.34/1,023.79 = 317.62/x
  3. Step 3: Cross multiply
    683.34x = 1,023.79 × 317.62
  4. Step 4: Simplify right side
    683.34x = 325,177.26
  5. Step 5: Solve for x
    x = 325,177.26/683.34
  6. Step 6: Final answer
    x = 475.87

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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.