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Finding the Fourth Proportional to 455.39, 683.19 and 147.26

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Solution

The fourth proportional to 455.39, 683.19 and 147.26 is: 220.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.39 : 683.19 = 147.26 : x
  2. Step 2: Convert to fraction form
    455.39/683.19 = 147.26/x
  3. Step 3: Cross multiply
    455.39x = 683.19 × 147.26
  4. Step 4: Simplify right side
    455.39x = 100,608.27
  5. Step 5: Solve for x
    x = 100,608.27/455.39
  6. Step 6: Final answer
    x = 220.93

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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.