Home / 855,605.40-1,283,408.10-809,986.20

Finding the Fourth Proportional to 855,605.40, 1,283,408.10 and 809,986.20

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Solution

The fourth proportional to 855,605.40, 1,283,408.10 and 809,986.20 is: 1,214,979.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    855,605.40 : 1,283,408.10 = 809,986.20 : x
  2. Step 2: Convert to fraction form
    855,605.40/1,283,408.10 = 809,986.20/x
  3. Step 3: Cross multiply
    855,605.40x = 1,283,408.10 × 809,986.20
  4. Step 4: Simplify right side
    855,605.40x = 1,039,542,849,968.22
  5. Step 5: Solve for x
    x = 1,039,542,849,968.22/855,605.40
  6. Step 6: Final answer
    x = 1,214,979.30

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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.