Home / 1,389,969.75-1,918,145.29-786,357.75

Finding the Fourth Proportional to 1,389,969.75, 1,918,145.29 and 786,357.75

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Solution

The fourth proportional to 1,389,969.75, 1,918,145.29 and 786,357.75 is: 1,085,166.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,969.75 : 1,918,145.29 = 786,357.75 : x
  2. Step 2: Convert to fraction form
    1,389,969.75/1,918,145.29 = 786,357.75/x
  3. Step 3: Cross multiply
    1,389,969.75x = 1,918,145.29 × 786,357.75
  4. Step 4: Simplify right side
    1,389,969.75x = 1,508,348,414,417.50
  5. Step 5: Solve for x
    x = 1,508,348,414,417.50/1,389,969.75
  6. Step 6: Final answer
    x = 1,085,166.36

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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.