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Finding the Fourth Proportional to 263,473.21, 395,272.69 and 85,980.54

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Solution

The fourth proportional to 263,473.21, 395,272.69 and 85,980.54 is: 128,991.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,473.21 : 395,272.69 = 85,980.54 : x
  2. Step 2: Convert to fraction form
    263,473.21/395,272.69 = 85,980.54/x
  3. Step 3: Cross multiply
    263,473.21x = 395,272.69 × 85,980.54
  4. Step 4: Simplify right side
    263,473.21x = 33,985,759,333.45
  5. Step 5: Solve for x
    x = 33,985,759,333.45/263,473.21
  6. Step 6: Final answer
    x = 128,991.33

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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.