Home / 428,260.28-641,689.59-259,268.41

Finding the Fourth Proportional to 428,260.28, 641,689.59 and 259,268.41

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Solution

The fourth proportional to 428,260.28, 641,689.59 and 259,268.41 is: 388,478.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,260.28 : 641,689.59 = 259,268.41 : x
  2. Step 2: Convert to fraction form
    428,260.28/641,689.59 = 259,268.41/x
  3. Step 3: Cross multiply
    428,260.28x = 641,689.59 × 259,268.41
  4. Step 4: Simplify right side
    428,260.28x = 166,369,836,504.40
  5. Step 5: Solve for x
    x = 166,369,836,504.40/428,260.28
  6. Step 6: Final answer
    x = 388,478.33

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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.