Home / 685,843.20-1,029,428.80-331,106.13

Finding the Fourth Proportional to 685,843.20, 1,029,428.80 and 331,106.13

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Solution

The fourth proportional to 685,843.20, 1,029,428.80 and 331,106.13 is: 496,979.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,843.20 : 1,029,428.80 = 331,106.13 : x
  2. Step 2: Convert to fraction form
    685,843.20/1,029,428.80 = 331,106.13/x
  3. Step 3: Cross multiply
    685,843.20x = 1,029,428.80 × 331,106.13
  4. Step 4: Simplify right side
    685,843.20x = 340,850,185,250.78
  5. Step 5: Solve for x
    x = 340,850,185,250.78/685,843.20
  6. Step 6: Final answer
    x = 496,979.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.