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Finding the Fourth Proportional to 257,858.75, 386,797.85 and 80,365.07

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Solution

The fourth proportional to 257,858.75, 386,797.85 and 80,365.07 is: 120,550.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,858.75 : 386,797.85 = 80,365.07 : x
  2. Step 2: Convert to fraction form
    257,858.75/386,797.85 = 80,365.07/x
  3. Step 3: Cross multiply
    257,858.75x = 386,797.85 × 80,365.07
  4. Step 4: Simplify right side
    257,858.75x = 31,085,035,889.27
  5. Step 5: Solve for x
    x = 31,085,035,889.27/257,858.75
  6. Step 6: Final answer
    x = 120,550.63

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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.