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Finding the Fourth Proportional to 248,396.40, 372,691.80 and 90,640.80

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Solution

The fourth proportional to 248,396.40, 372,691.80 and 90,640.80 is: 135,996.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,396.40 : 372,691.80 = 90,640.80 : x
  2. Step 2: Convert to fraction form
    248,396.40/372,691.80 = 90,640.80/x
  3. Step 3: Cross multiply
    248,396.40x = 372,691.80 × 90,640.80
  4. Step 4: Simplify right side
    248,396.40x = 33,781,082,905.44
  5. Step 5: Solve for x
    x = 33,781,082,905.44/248,396.40
  6. Step 6: Final answer
    x = 135,996.67

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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.