Home / 1,187,577.63-1,638,860.63-643,715.57

Finding the Fourth Proportional to 1,187,577.63, 1,638,860.63 and 643,715.57

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Solution

The fourth proportional to 1,187,577.63, 1,638,860.63 and 643,715.57 is: 888,329.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,577.63 : 1,638,860.63 = 643,715.57 : x
  2. Step 2: Convert to fraction form
    1,187,577.63/1,638,860.63 = 643,715.57/x
  3. Step 3: Cross multiply
    1,187,577.63x = 1,638,860.63 × 643,715.57
  4. Step 4: Simplify right side
    1,187,577.63x = 1,054,960,105,469.58
  5. Step 5: Solve for x
    x = 1,054,960,105,469.58/1,187,577.63
  6. Step 6: Final answer
    x = 888,329.38

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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.