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Finding the Fourth Proportional to 386,453.75, 579,400.35 and 259,779.80

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Solution

The fourth proportional to 386,453.75, 579,400.35 and 259,779.80 is: 389,481.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,453.75 : 579,400.35 = 259,779.80 : x
  2. Step 2: Convert to fraction form
    386,453.75/579,400.35 = 259,779.80/x
  3. Step 3: Cross multiply
    386,453.75x = 579,400.35 × 259,779.80
  4. Step 4: Simplify right side
    386,453.75x = 150,516,504,145.93
  5. Step 5: Solve for x
    x = 150,516,504,145.93/386,453.75
  6. Step 6: Final answer
    x = 389,481.29

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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.