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Finding the Fourth Proportional to 263,485.80, 395,228.70 and 259,986.60

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Solution

The fourth proportional to 263,485.80, 395,228.70 and 259,986.60 is: 389,979.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,485.80 : 395,228.70 = 259,986.60 : x
  2. Step 2: Convert to fraction form
    263,485.80/395,228.70 = 259,986.60/x
  3. Step 3: Cross multiply
    263,485.80x = 395,228.70 × 259,986.60
  4. Step 4: Simplify right side
    263,485.80x = 102,754,165,935.42
  5. Step 5: Solve for x
    x = 102,754,165,935.42/263,485.80
  6. Step 6: Final answer
    x = 389,979.90

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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.