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Finding the Fourth Proportional to 259,283.25, 388,990.49 and 72,294.75

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Solution

The fourth proportional to 259,283.25, 388,990.49 and 72,294.75 is: 108,460.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,283.25 : 388,990.49 = 72,294.75 : x
  2. Step 2: Convert to fraction form
    259,283.25/388,990.49 = 72,294.75/x
  3. Step 3: Cross multiply
    259,283.25x = 388,990.49 × 72,294.75
  4. Step 4: Simplify right side
    259,283.25x = 28,121,969,865.45
  5. Step 5: Solve for x
    x = 28,121,969,865.45/259,283.25
  6. Step 6: Final answer
    x = 108,460.42

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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.