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Finding the Fourth Proportional to 455.82, 683.73 and 212.06

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Solution

The fourth proportional to 455.82, 683.73 and 212.06 is: 318.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.82 : 683.73 = 212.06 : x
  2. Step 2: Convert to fraction form
    455.82/683.73 = 212.06/x
  3. Step 3: Cross multiply
    455.82x = 683.73 × 212.06
  4. Step 4: Simplify right side
    455.82x = 144,991.78
  5. Step 5: Solve for x
    x = 144,991.78/455.82
  6. Step 6: Final answer
    x = 318.09

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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.