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Finding the Fourth Proportional to 804,138.80, 1,206,121.80 and 213,162.80

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Solution

The fourth proportional to 804,138.80, 1,206,121.80 and 213,162.80 is: 319,721.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    804,138.80 : 1,206,121.80 = 213,162.80 : x
  2. Step 2: Convert to fraction form
    804,138.80/1,206,121.80 = 213,162.80/x
  3. Step 3: Cross multiply
    804,138.80x = 1,206,121.80 × 213,162.80
  4. Step 4: Simplify right side
    804,138.80x = 257,100,300,029.04
  5. Step 5: Solve for x
    x = 257,100,300,029.04/804,138.80
  6. Step 6: Final answer
    x = 319,721.30

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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.