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Finding the Fourth Proportional to 259,286.80, 388,930.20 and 170,813.20

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Solution

The fourth proportional to 259,286.80, 388,930.20 and 170,813.20 is: 256,219.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,286.80 : 388,930.20 = 170,813.20 : x
  2. Step 2: Convert to fraction form
    259,286.80/388,930.20 = 170,813.20/x
  3. Step 3: Cross multiply
    259,286.80x = 388,930.20 × 170,813.20
  4. Step 4: Simplify right side
    259,286.80x = 66,434,412,038.64
  5. Step 5: Solve for x
    x = 66,434,412,038.64/259,286.80
  6. Step 6: Final answer
    x = 256,219.80

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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.