Home / 685,435.36-945,930.34-379,511.72

Finding the Fourth Proportional to 685,435.36, 945,930.34 and 379,511.72

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Solution

The fourth proportional to 685,435.36, 945,930.34 and 379,511.72 is: 523,742.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,435.36 : 945,930.34 = 379,511.72 : x
  2. Step 2: Convert to fraction form
    685,435.36/945,930.34 = 379,511.72/x
  3. Step 3: Cross multiply
    685,435.36x = 945,930.34 × 379,511.72
  4. Step 4: Simplify right side
    685,435.36x = 358,991,650,333.59
  5. Step 5: Solve for x
    x = 358,991,650,333.59/685,435.36
  6. Step 6: Final answer
    x = 523,742.53

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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.