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Finding the Fourth Proportional to 260,860.70, 391,146.87 and 80,896.22

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Solution

The fourth proportional to 260,860.70, 391,146.87 and 80,896.22 is: 121,299.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,860.70 : 391,146.87 = 80,896.22 : x
  2. Step 2: Convert to fraction form
    260,860.70/391,146.87 = 80,896.22/x
  3. Step 3: Cross multiply
    260,860.70x = 391,146.87 × 80,896.22
  4. Step 4: Simplify right side
    260,860.70x = 31,642,303,247.83
  5. Step 5: Solve for x
    x = 31,642,303,247.83/260,860.70
  6. Step 6: Final answer
    x = 121,299.62

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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.