Home / 685,106,879.21-945,285,445.39-387,749,115.11

Finding the Fourth Proportional to 685,106,879.21, 945,285,445.39 and 387,749,115.11

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Solution

The fourth proportional to 685,106,879.21, 945,285,445.39 and 387,749,115.11 is: 535,002,064.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,106,879.21 : 945,285,445.39 = 387,749,115.11 : x
  2. Step 2: Convert to fraction form
    685,106,879.21/945,285,445.39 = 387,749,115.11/x
  3. Step 3: Cross multiply
    685,106,879.21x = 945,285,445.39 × 387,749,115.11
  4. Step 4: Simplify right side
    685,106,879.21x = 366,533,594,976,334,720
  5. Step 5: Solve for x
    x = 366,533,594,976,334,720/685,106,879.21
  6. Step 6: Final answer
    x = 535,002,064.79

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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.