Home / 1,428,243.40-1,970,909.94-783,647.56

Finding the Fourth Proportional to 1,428,243.40, 1,970,909.94 and 783,647.56

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Solution

The fourth proportional to 1,428,243.40, 1,970,909.94 and 783,647.56 is: 1,081,397.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428,243.40 : 1,970,909.94 = 783,647.56 : x
  2. Step 2: Convert to fraction form
    1,428,243.40/1,970,909.94 = 783,647.56/x
  3. Step 3: Cross multiply
    1,428,243.40x = 1,970,909.94 × 783,647.56
  4. Step 4: Simplify right side
    1,428,243.40x = 1,544,498,765,460.75
  5. Step 5: Solve for x
    x = 1,544,498,765,460.75/1,428,243.40
  6. Step 6: Final answer
    x = 1,081,397.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.