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Finding the Fourth Proportional to 455.63, 682.83 and 290.84

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Solution

The fourth proportional to 455.63, 682.83 and 290.84 is: 435.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.63 : 682.83 = 290.84 : x
  2. Step 2: Convert to fraction form
    455.63/682.83 = 290.84/x
  3. Step 3: Cross multiply
    455.63x = 682.83 × 290.84
  4. Step 4: Simplify right side
    455.63x = 198,590.86
  5. Step 5: Solve for x
    x = 198,590.86/455.63
  6. Step 6: Final answer
    x = 435.86

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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.