Home / 1,389,969-1,918,144.26-786,357

Finding the Fourth Proportional to 1,389,969, 1,918,144.26 and 786,357

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Solution

The fourth proportional to 1,389,969, 1,918,144.26 and 786,357 is: 1,085,165.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,969 : 1,918,144.26 = 786,357 : x
  2. Step 2: Convert to fraction form
    1,389,969/1,918,144.26 = 786,357/x
  3. Step 3: Cross multiply
    1,389,969x = 1,918,144.26 × 786,357
  4. Step 4: Simplify right side
    1,389,969x = 1,508,346,165,860.82
  5. Step 5: Solve for x
    x = 1,508,346,165,860.82/1,389,969
  6. Step 6: Final answer
    x = 1,085,165.33

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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.