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Finding the Fourth Proportional to 778,865.90, 1,091,986.90 and 778,865.90

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Solution

The fourth proportional to 778,865.90, 1,091,986.90 and 778,865.90 is: 1,091,986.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,865.90 : 1,091,986.90 = 778,865.90 : x
  2. Step 2: Convert to fraction form
    778,865.90/1,091,986.90 = 778,865.90/x
  3. Step 3: Cross multiply
    778,865.90x = 1,091,986.90 × 778,865.90
  4. Step 4: Simplify right side
    778,865.90x = 850,511,359,656.71
  5. Step 5: Solve for x
    x = 850,511,359,656.71/778,865.90
  6. Step 6: Final answer
    x = 1,091,986.90

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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.