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Finding the Fourth Proportional to 455,112, 682,668 and 122,688

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Solution

The fourth proportional to 455,112, 682,668 and 122,688 is: 184,032

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,112 : 682,668 = 122,688 : x
  2. Step 2: Convert to fraction form
    455,112/682,668 = 122,688/x
  3. Step 3: Cross multiply
    455,112x = 682,668 × 122,688
  4. Step 4: Simplify right side
    455,112x = 83,755,171,584
  5. Step 5: Solve for x
    x = 83,755,171,584/455,112
  6. Step 6: Final answer
    x = 184,032

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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.