Home / 1,187,721-1,639,059.48-643,857.84

Finding the Fourth Proportional to 1,187,721, 1,639,059.48 and 643,857.84

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Solution

The fourth proportional to 1,187,721, 1,639,059.48 and 643,857.84 is: 888,526.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,721 : 1,639,059.48 = 643,857.84 : x
  2. Step 2: Convert to fraction form
    1,187,721/1,639,059.48 = 643,857.84/x
  3. Step 3: Cross multiply
    1,187,721x = 1,639,059.48 × 643,857.84
  4. Step 4: Simplify right side
    1,187,721x = 1,055,321,296,424.32
  5. Step 5: Solve for x
    x = 1,055,321,296,424.32/1,187,721
  6. Step 6: Final answer
    x = 888,526.26

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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.