Home / 853,290.40-1,276,825.20-778,640.80

Finding the Fourth Proportional to 853,290.40, 1,276,825.20 and 778,640.80

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Solution

The fourth proportional to 853,290.40, 1,276,825.20 and 778,640.80 is: 1,165,122.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    853,290.40 : 1,276,825.20 = 778,640.80 : x
  2. Step 2: Convert to fraction form
    853,290.40/1,276,825.20 = 778,640.80/x
  3. Step 3: Cross multiply
    853,290.40x = 1,276,825.20 × 778,640.80
  4. Step 4: Simplify right side
    853,290.40x = 994,188,195,188.16
  5. Step 5: Solve for x
    x = 994,188,195,188.16/853,290.40
  6. Step 6: Final answer
    x = 1,165,122.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.