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Finding the Fourth Proportional to 778,978.80, 1,093,719.60 and 778,978.80

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Solution

The fourth proportional to 778,978.80, 1,093,719.60 and 778,978.80 is: 1,093,719.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,978.80 : 1,093,719.60 = 778,978.80 : x
  2. Step 2: Convert to fraction form
    778,978.80/1,093,719.60 = 778,978.80/x
  3. Step 3: Cross multiply
    778,978.80x = 1,093,719.60 × 778,978.80
  4. Step 4: Simplify right side
    778,978.80x = 851,984,381,544.48
  5. Step 5: Solve for x
    x = 851,984,381,544.48/778,978.80
  6. Step 6: Final answer
    x = 1,093,719.60

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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.