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Finding the Fourth Proportional to 379,489.76, 569,170.08 and 126,741.60

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Solution

The fourth proportional to 379,489.76, 569,170.08 and 126,741.60 is: 190,090.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,489.76 : 569,170.08 = 126,741.60 : x
  2. Step 2: Convert to fraction form
    379,489.76/569,170.08 = 126,741.60/x
  3. Step 3: Cross multiply
    379,489.76x = 569,170.08 × 126,741.60
  4. Step 4: Simplify right side
    379,489.76x = 72,137,526,611.33
  5. Step 5: Solve for x
    x = 72,137,526,611.33/379,489.76
  6. Step 6: Final answer
    x = 190,090.84

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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.