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Finding the Fourth Proportional to 263,999.40, 395,999.10 and 139,583.40

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Solution

The fourth proportional to 263,999.40, 395,999.10 and 139,583.40 is: 209,375.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,999.40 : 395,999.10 = 139,583.40 : x
  2. Step 2: Convert to fraction form
    263,999.40/395,999.10 = 139,583.40/x
  3. Step 3: Cross multiply
    263,999.40x = 395,999.10 × 139,583.40
  4. Step 4: Simplify right side
    263,999.40x = 55,274,900,774.94
  5. Step 5: Solve for x
    x = 55,274,900,774.94/263,999.40
  6. Step 6: Final answer
    x = 209,375.10

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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.