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Finding the Fourth Proportional to 259,986.20, 389,323.20 and 207,498.20

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Solution

The fourth proportional to 259,986.20, 389,323.20 and 207,498.20 is: 310,723.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,986.20 : 389,323.20 = 207,498.20 : x
  2. Step 2: Convert to fraction form
    259,986.20/389,323.20 = 207,498.20/x
  3. Step 3: Cross multiply
    259,986.20x = 389,323.20 × 207,498.20
  4. Step 4: Simplify right side
    259,986.20x = 80,783,863,218.24
  5. Step 5: Solve for x
    x = 80,783,863,218.24/259,986.20
  6. Step 6: Final answer
    x = 310,723.66

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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.