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Finding the Fourth Proportional to 455.29, 682.32 and 208.19

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Solution

The fourth proportional to 455.29, 682.32 and 208.19 is: 312.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.29 : 682.32 = 208.19 : x
  2. Step 2: Convert to fraction form
    455.29/682.32 = 208.19/x
  3. Step 3: Cross multiply
    455.29x = 682.32 × 208.19
  4. Step 4: Simplify right side
    455.29x = 142,052.85
  5. Step 5: Solve for x
    x = 142,052.85/455.29
  6. Step 6: Final answer
    x = 312.00

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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.