Home / 419,918.31-579,498.30-258,879.78

Finding the Fourth Proportional to 419,918.31, 579,498.30 and 258,879.78

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Solution

The fourth proportional to 419,918.31, 579,498.30 and 258,879.78 is: 357,260.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,918.31 : 579,498.30 = 258,879.78 : x
  2. Step 2: Convert to fraction form
    419,918.31/579,498.30 = 258,879.78/x
  3. Step 3: Cross multiply
    419,918.31x = 579,498.30 × 258,879.78
  4. Step 4: Simplify right side
    419,918.31x = 150,020,392,414.37
  5. Step 5: Solve for x
    x = 150,020,392,414.37/419,918.31
  6. Step 6: Final answer
    x = 357,260.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.