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Finding the Fourth Proportional to 263,400.60, 395,060.79 and 85,907.32

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Solution

The fourth proportional to 263,400.60, 395,060.79 and 85,907.32 is: 128,847.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,400.60 : 395,060.79 = 85,907.32 : x
  2. Step 2: Convert to fraction form
    263,400.60/395,060.79 = 85,907.32/x
  3. Step 3: Cross multiply
    263,400.60x = 395,060.79 × 85,907.32
  4. Step 4: Simplify right side
    263,400.60x = 33,938,613,705.98
  5. Step 5: Solve for x
    x = 33,938,613,705.98/263,400.60
  6. Step 6: Final answer
    x = 128,847.90

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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.