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Finding the Fourth Proportional to 259,790.55, 389,685.83 and 217,800.15

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Solution

The fourth proportional to 259,790.55, 389,685.83 and 217,800.15 is: 326,700.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,790.55 : 389,685.83 = 217,800.15 : x
  2. Step 2: Convert to fraction form
    259,790.55/389,685.83 = 217,800.15/x
  3. Step 3: Cross multiply
    259,790.55x = 389,685.83 × 217,800.15
  4. Step 4: Simplify right side
    259,790.55x = 84,873,631,137.87
  5. Step 5: Solve for x
    x = 84,873,631,137.87/259,790.55
  6. Step 6: Final answer
    x = 326,700.23

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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.