Home / 1,387,086-2,080,629-389,814

Finding the Fourth Proportional to 1,387,086, 2,080,629 and 389,814

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Solution

The fourth proportional to 1,387,086, 2,080,629 and 389,814 is: 584,721

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,086 : 2,080,629 = 389,814 : x
  2. Step 2: Convert to fraction form
    1,387,086/2,080,629 = 389,814/x
  3. Step 3: Cross multiply
    1,387,086x = 2,080,629 × 389,814
  4. Step 4: Simplify right side
    1,387,086x = 811,058,313,006
  5. Step 5: Solve for x
    x = 811,058,313,006/1,387,086
  6. Step 6: Final answer
    x = 584,721

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.