Home / 428,260.09-641,689.31-259,268.22

Finding the Fourth Proportional to 428,260.09, 641,689.31 and 259,268.22

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Solution

The fourth proportional to 428,260.09, 641,689.31 and 259,268.22 is: 388,478.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,260.09 : 641,689.31 = 259,268.22 : x
  2. Step 2: Convert to fraction form
    428,260.09/641,689.31 = 259,268.22/x
  3. Step 3: Cross multiply
    428,260.09x = 641,689.31 × 259,268.22
  4. Step 4: Simplify right side
    428,260.09x = 166,369,643,268.42
  5. Step 5: Solve for x
    x = 166,369,643,268.42/428,260.09
  6. Step 6: Final answer
    x = 388,478.04

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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.