Home / 1,311,129.45-1,809,358.11-767,368.80

Finding the Fourth Proportional to 1,311,129.45, 1,809,358.11 and 767,368.80

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Solution

The fourth proportional to 1,311,129.45, 1,809,358.11 and 767,368.80 is: 1,058,968.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311,129.45 : 1,809,358.11 = 767,368.80 : x
  2. Step 2: Convert to fraction form
    1,311,129.45/1,809,358.11 = 767,368.80/x
  3. Step 3: Cross multiply
    1,311,129.45x = 1,809,358.11 × 767,368.80
  4. Step 4: Simplify right side
    1,311,129.45x = 1,388,444,961,640.97
  5. Step 5: Solve for x
    x = 1,388,444,961,640.97/1,311,129.45
  6. Step 6: Final answer
    x = 1,058,968.63

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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.