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Finding the Fourth Proportional to 1,216,932.38, 1,821,661.82 and 765,539.74

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Solution

The fourth proportional to 1,216,932.38, 1,821,661.82 and 765,539.74 is: 1,145,958.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216,932.38 : 1,821,661.82 = 765,539.74 : x
  2. Step 2: Convert to fraction form
    1,216,932.38/1,821,661.82 = 765,539.74/x
  3. Step 3: Cross multiply
    1,216,932.38x = 1,821,661.82 × 765,539.74
  4. Step 4: Simplify right side
    1,216,932.38x = 1,394,554,516,050.73
  5. Step 5: Solve for x
    x = 1,394,554,516,050.73/1,216,932.38
  6. Step 6: Final answer
    x = 1,145,958.92

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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.