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Finding the Fourth Proportional to 259,940.70, 389,254.95 and 170,711.10

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Solution

The fourth proportional to 259,940.70, 389,254.95 and 170,711.10 is: 255,635.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,940.70 : 389,254.95 = 170,711.10 : x
  2. Step 2: Convert to fraction form
    259,940.70/389,254.95 = 170,711.10/x
  3. Step 3: Cross multiply
    259,940.70x = 389,254.95 × 170,711.10
  4. Step 4: Simplify right side
    259,940.70x = 66,450,140,694.95
  5. Step 5: Solve for x
    x = 66,450,140,694.95/259,940.70
  6. Step 6: Final answer
    x = 255,635.77

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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.