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Finding the Fourth Proportional to 220,436.88, 330,748.92 and 120,480.26

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Solution

The fourth proportional to 220,436.88, 330,748.92 and 120,480.26 is: 180,771.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,436.88 : 330,748.92 = 120,480.26 : x
  2. Step 2: Convert to fraction form
    220,436.88/330,748.92 = 120,480.26/x
  3. Step 3: Cross multiply
    220,436.88x = 330,748.92 × 120,480.26
  4. Step 4: Simplify right side
    220,436.88x = 39,848,715,876.32
  5. Step 5: Solve for x
    x = 39,848,715,876.32/220,436.88
  6. Step 6: Final answer
    x = 180,771.55

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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.