Home / 1,299,309.70-1,946,012.10-821,012.80

Finding the Fourth Proportional to 1,299,309.70, 1,946,012.10 and 821,012.80

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Solution

The fourth proportional to 1,299,309.70, 1,946,012.10 and 821,012.80 is: 1,229,653.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299,309.70 : 1,946,012.10 = 821,012.80 : x
  2. Step 2: Convert to fraction form
    1,299,309.70/1,946,012.10 = 821,012.80/x
  3. Step 3: Cross multiply
    1,299,309.70x = 1,946,012.10 × 821,012.80
  4. Step 4: Simplify right side
    1,299,309.70x = 1,597,700,843,054.88
  5. Step 5: Solve for x
    x = 1,597,700,843,054.88/1,299,309.70
  6. Step 6: Final answer
    x = 1,229,653.59

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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.