Home / 1,398,971.36-1,930,537.32-787,158.38

Finding the Fourth Proportional to 1,398,971.36, 1,930,537.32 and 787,158.38

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Solution

The fourth proportional to 1,398,971.36, 1,930,537.32 and 787,158.38 is: 1,086,254.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398,971.36 : 1,930,537.32 = 787,158.38 : x
  2. Step 2: Convert to fraction form
    1,398,971.36/1,930,537.32 = 787,158.38/x
  3. Step 3: Cross multiply
    1,398,971.36x = 1,930,537.32 × 787,158.38
  4. Step 4: Simplify right side
    1,398,971.36x = 1,519,638,629,340.74
  5. Step 5: Solve for x
    x = 1,519,638,629,340.74/1,398,971.36
  6. Step 6: Final answer
    x = 1,086,254.28

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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.