Home / 681,123.89-939,951.21-394,810.07

Finding the Fourth Proportional to 681,123.89, 939,951.21 and 394,810.07

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Solution

The fourth proportional to 681,123.89, 939,951.21 and 394,810.07 is: 544,838.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,123.89 : 939,951.21 = 394,810.07 : x
  2. Step 2: Convert to fraction form
    681,123.89/939,951.21 = 394,810.07/x
  3. Step 3: Cross multiply
    681,123.89x = 939,951.21 × 394,810.07
  4. Step 4: Simplify right side
    681,123.89x = 371,102,198,316.93
  5. Step 5: Solve for x
    x = 371,102,198,316.93/681,123.89
  6. Step 6: Final answer
    x = 544,838.03

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1.5x scale

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.