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Finding the Fourth Proportional to 778,879.20, 1,093,380 and 778,879.20

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Solution

The fourth proportional to 778,879.20, 1,093,380 and 778,879.20 is: 1,093,380

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,879.20 : 1,093,380 = 778,879.20 : x
  2. Step 2: Convert to fraction form
    778,879.20/1,093,380 = 778,879.20/x
  3. Step 3: Cross multiply
    778,879.20x = 1,093,380 × 778,879.20
  4. Step 4: Simplify right side
    778,879.20x = 851,610,939,696
  5. Step 5: Solve for x
    x = 851,610,939,696/778,879.20
  6. Step 6: Final answer
    x = 1,093,380

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.