Home / 685,428.23-945,900.97-394,879.50

Finding the Fourth Proportional to 685,428.23, 945,900.97 and 394,879.50

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Solution

The fourth proportional to 685,428.23, 945,900.97 and 394,879.50 is: 544,939.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,428.23 : 945,900.97 = 394,879.50 : x
  2. Step 2: Convert to fraction form
    685,428.23/945,900.97 = 394,879.50/x
  3. Step 3: Cross multiply
    685,428.23x = 945,900.97 × 394,879.50
  4. Step 4: Simplify right side
    685,428.23x = 373,516,900,108.72
  5. Step 5: Solve for x
    x = 373,516,900,108.72/685,428.23
  6. Step 6: Final answer
    x = 544,939.48

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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.