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Finding the Fourth Proportional to 290,379.78, 435,647.34 and 262,619.46

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Solution

The fourth proportional to 290,379.78, 435,647.34 and 262,619.46 is: 393,999.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,379.78 : 435,647.34 = 262,619.46 : x
  2. Step 2: Convert to fraction form
    290,379.78/435,647.34 = 262,619.46/x
  3. Step 3: Cross multiply
    290,379.78x = 435,647.34 × 262,619.46
  4. Step 4: Simplify right side
    290,379.78x = 114,409,469,181.24
  5. Step 5: Solve for x
    x = 114,409,469,181.24/290,379.78
  6. Step 6: Final answer
    x = 393,999.43

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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.