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Finding the Fourth Proportional to 260,858.70, 391,143.87 and 80,894.22

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Solution

The fourth proportional to 260,858.70, 391,143.87 and 80,894.22 is: 121,296.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,858.70 : 391,143.87 = 80,894.22 : x
  2. Step 2: Convert to fraction form
    260,858.70/391,143.87 = 80,894.22/x
  3. Step 3: Cross multiply
    260,858.70x = 391,143.87 × 80,894.22
  4. Step 4: Simplify right side
    260,858.70x = 31,641,278,271.43
  5. Step 5: Solve for x
    x = 31,641,278,271.43/260,858.70
  6. Step 6: Final answer
    x = 121,296.62

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1.5x scale

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.