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Finding the Fourth Proportional to 260,969.77, 391,174.79 and 170,978.48

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Solution

The fourth proportional to 260,969.77, 391,174.79 and 170,978.48 is: 256,284.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,969.77 : 391,174.79 = 170,978.48 : x
  2. Step 2: Convert to fraction form
    260,969.77/391,174.79 = 170,978.48/x
  3. Step 3: Cross multiply
    260,969.77x = 391,174.79 × 170,978.48
  4. Step 4: Simplify right side
    260,969.77x = 66,882,472,757.56
  5. Step 5: Solve for x
    x = 66,882,472,757.56/260,969.77
  6. Step 6: Final answer
    x = 256,284.36

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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.