Home / 685,106,878.83-945,285,444.88-387,749,114.73

Finding the Fourth Proportional to 685,106,878.83, 945,285,444.88 and 387,749,114.73

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Solution

The fourth proportional to 685,106,878.83, 945,285,444.88 and 387,749,114.73 is: 535,002,064.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,106,878.83 : 945,285,444.88 = 387,749,114.73 : x
  2. Step 2: Convert to fraction form
    685,106,878.83/945,285,444.88 = 387,749,114.73/x
  3. Step 3: Cross multiply
    685,106,878.83x = 945,285,444.88 × 387,749,114.73
  4. Step 4: Simplify right side
    685,106,878.83x = 366,533,594,418,404,864
  5. Step 5: Solve for x
    x = 366,533,594,418,404,864/685,106,878.83
  6. Step 6: Final answer
    x = 535,002,064.27

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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.