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Finding the Fourth Proportional to 455.42, 682.96 and 147.19

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Solution

The fourth proportional to 455.42, 682.96 and 147.19 is: 220.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.42 : 682.96 = 147.19 : x
  2. Step 2: Convert to fraction form
    455.42/682.96 = 147.19/x
  3. Step 3: Cross multiply
    455.42x = 682.96 × 147.19
  4. Step 4: Simplify right side
    455.42x = 100,523.23
  5. Step 5: Solve for x
    x = 100,523.23/455.42
  6. Step 6: Final answer
    x = 220.73

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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.