Home / 685,649.56-1,029,137.72-330,913.32

Finding the Fourth Proportional to 685,649.56, 1,029,137.72 and 330,913.32

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Solution

The fourth proportional to 685,649.56, 1,029,137.72 and 330,913.32 is: 496,690.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,649.56 : 1,029,137.72 = 330,913.32 : x
  2. Step 2: Convert to fraction form
    685,649.56/1,029,137.72 = 330,913.32/x
  3. Step 3: Cross multiply
    685,649.56x = 1,029,137.72 × 330,913.32
  4. Step 4: Simplify right side
    685,649.56x = 340,555,379,662.43
  5. Step 5: Solve for x
    x = 340,555,379,662.43/685,649.56
  6. Step 6: Final answer
    x = 496,690.15

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1.5x scale

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.