Home / 685,384.56-945,930.02-394,939.62

Finding the Fourth Proportional to 685,384.56, 945,930.02 and 394,939.62

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Solution

The fourth proportional to 685,384.56, 945,930.02 and 394,939.62 is: 545,073.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,384.56 : 945,930.02 = 394,939.62 : x
  2. Step 2: Convert to fraction form
    685,384.56/945,930.02 = 394,939.62/x
  3. Step 3: Cross multiply
    685,384.56x = 945,930.02 × 394,939.62
  4. Step 4: Simplify right side
    685,384.56x = 373,585,240,670.69
  5. Step 5: Solve for x
    x = 373,585,240,670.69/685,384.56
  6. Step 6: Final answer
    x = 545,073.91

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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.