Home / 1,333,380.07-1,999,987.96-821,142.80

Finding the Fourth Proportional to 1,333,380.07, 1,999,987.96 and 821,142.80

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Solution

The fourth proportional to 1,333,380.07, 1,999,987.96 and 821,142.80 is: 1,231,663.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,333,380.07 : 1,999,987.96 = 821,142.80 : x
  2. Step 2: Convert to fraction form
    1,333,380.07/1,999,987.96 = 821,142.80/x
  3. Step 3: Cross multiply
    1,333,380.07x = 1,999,987.96 × 821,142.80
  4. Step 4: Simplify right side
    1,333,380.07x = 1,642,275,710,427.49
  5. Step 5: Solve for x
    x = 1,642,275,710,427.49/1,333,380.07
  6. Step 6: Final answer
    x = 1,231,663.61

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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.