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Finding the Fourth Proportional to 220,672.40, 331,145.40 and 115,566.80

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Solution

The fourth proportional to 220,672.40, 331,145.40 and 115,566.80 is: 173,421.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,672.40 : 331,145.40 = 115,566.80 : x
  2. Step 2: Convert to fraction form
    220,672.40/331,145.40 = 115,566.80/x
  3. Step 3: Cross multiply
    220,672.40x = 331,145.40 × 115,566.80
  4. Step 4: Simplify right side
    220,672.40x = 38,269,414,212.72
  5. Step 5: Solve for x
    x = 38,269,414,212.72/220,672.40
  6. Step 6: Final answer
    x = 173,421.84

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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.