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Finding the Fourth Proportional to 379,071.75, 522,692.55 and 309,945.54

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Solution

The fourth proportional to 379,071.75, 522,692.55 and 309,945.54 is: 427,376.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,071.75 : 522,692.55 = 309,945.54 : x
  2. Step 2: Convert to fraction form
    379,071.75/522,692.55 = 309,945.54/x
  3. Step 3: Cross multiply
    379,071.75x = 522,692.55 × 309,945.54
  4. Step 4: Simplify right side
    379,071.75x = 162,006,224,663.73
  5. Step 5: Solve for x
    x = 162,006,224,663.73/379,071.75
  6. Step 6: Final answer
    x = 427,376.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.