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Finding the Fourth Proportional to 259,729.20, 389,593.80 and 171,034.20

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Solution

The fourth proportional to 259,729.20, 389,593.80 and 171,034.20 is: 256,551.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,729.20 : 389,593.80 = 171,034.20 : x
  2. Step 2: Convert to fraction form
    259,729.20/389,593.80 = 171,034.20/x
  3. Step 3: Cross multiply
    259,729.20x = 389,593.80 × 171,034.20
  4. Step 4: Simplify right side
    259,729.20x = 66,633,863,907.96
  5. Step 5: Solve for x
    x = 66,633,863,907.96/259,729.20
  6. Step 6: Final answer
    x = 256,551.30

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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.