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Finding the Fourth Proportional to 263,485.40, 395,093.64 and 85,878.32

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Solution

The fourth proportional to 263,485.40, 395,093.64 and 85,878.32 is: 128,773.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,485.40 : 395,093.64 = 85,878.32 : x
  2. Step 2: Convert to fraction form
    263,485.40/395,093.64 = 85,878.32/x
  3. Step 3: Cross multiply
    263,485.40x = 395,093.64 × 85,878.32
  4. Step 4: Simplify right side
    263,485.40x = 33,929,978,045.88
  5. Step 5: Solve for x
    x = 33,929,978,045.88/263,485.40
  6. Step 6: Final answer
    x = 128,773.66

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1.5x scale

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.