Home / 1,187,612.85-1,638,906.93-643,748.52

Finding the Fourth Proportional to 1,187,612.85, 1,638,906.93 and 643,748.52

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Solution

The fourth proportional to 1,187,612.85, 1,638,906.93 and 643,748.52 is: 888,373.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,612.85 : 1,638,906.93 = 643,748.52 : x
  2. Step 2: Convert to fraction form
    1,187,612.85/1,638,906.93 = 643,748.52/x
  3. Step 3: Cross multiply
    1,187,612.85x = 1,638,906.93 × 643,748.52
  4. Step 4: Simplify right side
    1,187,612.85x = 1,055,043,910,605.24
  5. Step 5: Solve for x
    x = 1,055,043,910,605.24/1,187,612.85
  6. Step 6: Final answer
    x = 888,373.61

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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.