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Finding the Fourth Proportional to 455.14, 682.06 and 194.78

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Solution

The fourth proportional to 455.14, 682.06 and 194.78 is: 291.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.14 : 682.06 = 194.78 : x
  2. Step 2: Convert to fraction form
    455.14/682.06 = 194.78/x
  3. Step 3: Cross multiply
    455.14x = 682.06 × 194.78
  4. Step 4: Simplify right side
    455.14x = 132,851.65
  5. Step 5: Solve for x
    x = 132,851.65/455.14
  6. Step 6: Final answer
    x = 291.89

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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.