Home / 1,428,399.09-1,971,189.54-783,859.77

Finding the Fourth Proportional to 1,428,399.09, 1,971,189.54 and 783,859.77

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Solution

The fourth proportional to 1,428,399.09, 1,971,189.54 and 783,859.77 is: 1,081,725.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428,399.09 : 1,971,189.54 = 783,859.77 : x
  2. Step 2: Convert to fraction form
    1,428,399.09/1,971,189.54 = 783,859.77/x
  3. Step 3: Cross multiply
    1,428,399.09x = 1,971,189.54 × 783,859.77
  4. Step 4: Simplify right side
    1,428,399.09x = 1,545,136,179,450.81
  5. Step 5: Solve for x
    x = 1,545,136,179,450.81/1,428,399.09
  6. Step 6: Final answer
    x = 1,081,725.82

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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.