Home / 685,965.12-946,460.88-395,665.44

Finding the Fourth Proportional to 685,965.12, 946,460.88 and 395,665.44

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Solution

The fourth proportional to 685,965.12, 946,460.88 and 395,665.44 is: 545,919.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,965.12 : 946,460.88 = 395,665.44 : x
  2. Step 2: Convert to fraction form
    685,965.12/946,460.88 = 395,665.44/x
  3. Step 3: Cross multiply
    685,965.12x = 946,460.88 × 395,665.44
  4. Step 4: Simplify right side
    685,965.12x = 374,481,860,527.99
  5. Step 5: Solve for x
    x = 374,481,860,527.99/685,965.12
  6. Step 6: Final answer
    x = 545,919.68

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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.