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Finding the Fourth Proportional to 260,828.80, 391,243.20 and 259,273.60

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Solution

The fourth proportional to 260,828.80, 391,243.20 and 259,273.60 is: 388,910.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,828.80 : 391,243.20 = 259,273.60 : x
  2. Step 2: Convert to fraction form
    260,828.80/391,243.20 = 259,273.60/x
  3. Step 3: Cross multiply
    260,828.80x = 391,243.20 × 259,273.60
  4. Step 4: Simplify right side
    260,828.80x = 101,439,032,939.52
  5. Step 5: Solve for x
    x = 101,439,032,939.52/260,828.80
  6. Step 6: Final answer
    x = 388,910.40

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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.