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Finding the Fourth Proportional to 1,245,682.80, 1,865,413.80 and 822,668.40

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Solution

The fourth proportional to 1,245,682.80, 1,865,413.80 and 822,668.40 is: 1,231,948.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245,682.80 : 1,865,413.80 = 822,668.40 : x
  2. Step 2: Convert to fraction form
    1,245,682.80/1,865,413.80 = 822,668.40/x
  3. Step 3: Cross multiply
    1,245,682.80x = 1,865,413.80 × 822,668.40
  4. Step 4: Simplify right side
    1,245,682.80x = 1,534,616,986,183.92
  5. Step 5: Solve for x
    x = 1,534,616,986,183.92/1,245,682.80
  6. Step 6: Final answer
    x = 1,231,948.44

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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.