Home / 1,383,998.41-1,909,918.07-780,386.41

Finding the Fourth Proportional to 1,383,998.41, 1,909,918.07 and 780,386.41

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Solution

The fourth proportional to 1,383,998.41, 1,909,918.07 and 780,386.41 is: 1,076,933.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383,998.41 : 1,909,918.07 = 780,386.41 : x
  2. Step 2: Convert to fraction form
    1,383,998.41/1,909,918.07 = 780,386.41/x
  3. Step 3: Cross multiply
    1,383,998.41x = 1,909,918.07 × 780,386.41
  4. Step 4: Simplify right side
    1,383,998.41x = 1,490,474,106,041.43
  5. Step 5: Solve for x
    x = 1,490,474,106,041.43/1,383,998.41
  6. Step 6: Final answer
    x = 1,076,933.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.