Home / 1,187,363.95-1,638,558.05-643,512.94

Finding the Fourth Proportional to 1,187,363.95, 1,638,558.05 and 643,512.94

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Solution

The fourth proportional to 1,187,363.95, 1,638,558.05 and 643,512.94 is: 888,045.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,363.95 : 1,638,558.05 = 643,512.94 : x
  2. Step 2: Convert to fraction form
    1,187,363.95/1,638,558.05 = 643,512.94/x
  3. Step 3: Cross multiply
    1,187,363.95x = 1,638,558.05 × 643,512.94
  4. Step 4: Simplify right side
    1,187,363.95x = 1,054,433,305,628.55
  5. Step 5: Solve for x
    x = 1,054,433,305,628.55/1,187,363.95
  6. Step 6: Final answer
    x = 888,045.58

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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.