Home / 858,983.90-1,288,147.80-259,745.90

Finding the Fourth Proportional to 858,983.90, 1,288,147.80 and 259,745.90

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Solution

The fourth proportional to 858,983.90, 1,288,147.80 and 259,745.90 is: 389,519.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,983.90 : 1,288,147.80 = 259,745.90 : x
  2. Step 2: Convert to fraction form
    858,983.90/1,288,147.80 = 259,745.90/x
  3. Step 3: Cross multiply
    858,983.90x = 1,288,147.80 × 259,745.90
  4. Step 4: Simplify right side
    858,983.90x = 334,591,109,644.02
  5. Step 5: Solve for x
    x = 334,591,109,644.02/858,983.90
  6. Step 6: Final answer
    x = 389,519.65

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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.