Home / 685,104,969.68-945,336,865.96-399,043,575.12

Finding the Fourth Proportional to 685,104,969.68, 945,336,865.96 and 399,043,575.12

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Solution

The fourth proportional to 685,104,969.68, 945,336,865.96 and 399,043,575.12 is: 550,617,232.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,104,969.68 : 945,336,865.96 = 399,043,575.12 : x
  2. Step 2: Convert to fraction form
    685,104,969.68/945,336,865.96 = 399,043,575.12/x
  3. Step 3: Cross multiply
    685,104,969.68x = 945,336,865.96 × 399,043,575.12
  4. Step 4: Simplify right side
    685,104,969.68x = 377,230,602,683,419,456
  5. Step 5: Solve for x
    x = 377,230,602,683,419,456/685,104,969.68
  6. Step 6: Final answer
    x = 550,617,232.95

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Double scale
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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.