Home / 1,388,209.20-1,915,826.22-776,418.90

Finding the Fourth Proportional to 1,388,209.20, 1,915,826.22 and 776,418.90

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Solution

The fourth proportional to 1,388,209.20, 1,915,826.22 and 776,418.90 is: 1,071,512.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,209.20 : 1,915,826.22 = 776,418.90 : x
  2. Step 2: Convert to fraction form
    1,388,209.20/1,915,826.22 = 776,418.90/x
  3. Step 3: Cross multiply
    1,388,209.20x = 1,915,826.22 × 776,418.90
  4. Step 4: Simplify right side
    1,388,209.20x = 1,487,483,686,323.56
  5. Step 5: Solve for x
    x = 1,487,483,686,323.56/1,388,209.20
  6. Step 6: Final answer
    x = 1,071,512.63

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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.