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Finding the Fourth Proportional to 455.26, 683.12 and 211.73

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Solution

The fourth proportional to 455.26, 683.12 and 211.73 is: 317.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.26 : 683.12 = 211.73 : x
  2. Step 2: Convert to fraction form
    455.26/683.12 = 211.73/x
  3. Step 3: Cross multiply
    455.26x = 683.12 × 211.73
  4. Step 4: Simplify right side
    455.26x = 144,637.00
  5. Step 5: Solve for x
    x = 144,637.00/455.26
  6. Step 6: Final answer
    x = 317.70

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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.