Home / 1,291,278.80-1,936,918.20-820,053.20

Finding the Fourth Proportional to 1,291,278.80, 1,936,918.20 and 820,053.20

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Solution

The fourth proportional to 1,291,278.80, 1,936,918.20 and 820,053.20 is: 1,230,079.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291,278.80 : 1,936,918.20 = 820,053.20 : x
  2. Step 2: Convert to fraction form
    1,291,278.80/1,936,918.20 = 820,053.20/x
  3. Step 3: Cross multiply
    1,291,278.80x = 1,936,918.20 × 820,053.20
  4. Step 4: Simplify right side
    1,291,278.80x = 1,588,375,968,048.24
  5. Step 5: Solve for x
    x = 1,588,375,968,048.24/1,291,278.80
  6. Step 6: Final answer
    x = 1,230,079.80

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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.