Home / 1,428,216.40-1,970,974.91-783,636.42

Finding the Fourth Proportional to 1,428,216.40, 1,970,974.91 and 783,636.42

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Solution

The fourth proportional to 1,428,216.40, 1,970,974.91 and 783,636.42 is: 1,081,438.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428,216.40 : 1,970,974.91 = 783,636.42 : x
  2. Step 2: Convert to fraction form
    1,428,216.40/1,970,974.91 = 783,636.42/x
  3. Step 3: Cross multiply
    1,428,216.40x = 1,970,974.91 × 783,636.42
  4. Step 4: Simplify right side
    1,428,216.40x = 1,544,527,727,324.51
  5. Step 5: Solve for x
    x = 1,544,527,727,324.51/1,428,216.40
  6. Step 6: Final answer
    x = 1,081,438.17

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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.