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Finding the Fourth Proportional to 220,256.52, 330,490.62 and 120,412.68

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Solution

The fourth proportional to 220,256.52, 330,490.62 and 120,412.68 is: 180,676.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,256.52 : 330,490.62 = 120,412.68 : x
  2. Step 2: Convert to fraction form
    220,256.52/330,490.62 = 120,412.68/x
  3. Step 3: Cross multiply
    220,256.52x = 330,490.62 × 120,412.68
  4. Step 4: Simplify right side
    220,256.52x = 39,795,261,269.06
  5. Step 5: Solve for x
    x = 39,795,261,269.06/220,256.52
  6. Step 6: Final answer
    x = 180,676.88

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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.