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Finding the Fourth Proportional to 1,188,824.98, 1,640,733.22 and 665,734.82

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Solution

The fourth proportional to 1,188,824.98, 1,640,733.22 and 665,734.82 is: 918,800.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188,824.98 : 1,640,733.22 = 665,734.82 : x
  2. Step 2: Convert to fraction form
    1,188,824.98/1,640,733.22 = 665,734.82/x
  3. Step 3: Cross multiply
    1,188,824.98x = 1,640,733.22 × 665,734.82
  4. Step 4: Simplify right side
    1,188,824.98x = 1,092,293,229,385.60
  5. Step 5: Solve for x
    x = 1,092,293,229,385.60/1,188,824.98
  6. Step 6: Final answer
    x = 918,800.71

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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.