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Finding the Fourth Proportional to 455.09, 682.39 and 162.47

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Solution

The fourth proportional to 455.09, 682.39 and 162.47 is: 243.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.09 : 682.39 = 162.47 : x
  2. Step 2: Convert to fraction form
    455.09/682.39 = 162.47/x
  3. Step 3: Cross multiply
    455.09x = 682.39 × 162.47
  4. Step 4: Simplify right side
    455.09x = 110,869.81
  5. Step 5: Solve for x
    x = 110,869.81/455.09
  6. Step 6: Final answer
    x = 243.62

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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.