Home / 1,219,630.82-1,829,736.91-420,919.31

Finding the Fourth Proportional to 1,219,630.82, 1,829,736.91 and 420,919.31

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Solution

The fourth proportional to 1,219,630.82, 1,829,736.91 and 420,919.31 is: 631,479.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,219,630.82 : 1,829,736.91 = 420,919.31 : x
  2. Step 2: Convert to fraction form
    1,219,630.82/1,829,736.91 = 420,919.31/x
  3. Step 3: Cross multiply
    1,219,630.82x = 1,829,736.91 × 420,919.31
  4. Step 4: Simplify right side
    1,219,630.82x = 770,171,602,739.22
  5. Step 5: Solve for x
    x = 770,171,602,739.22/1,219,630.82
  6. Step 6: Final answer
    x = 631,479.29

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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.