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Finding the Fourth Proportional to 218,936.20, 328,404.30 and 144,140.80

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Solution

The fourth proportional to 218,936.20, 328,404.30 and 144,140.80 is: 216,211.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,936.20 : 328,404.30 = 144,140.80 : x
  2. Step 2: Convert to fraction form
    218,936.20/328,404.30 = 144,140.80/x
  3. Step 3: Cross multiply
    218,936.20x = 328,404.30 × 144,140.80
  4. Step 4: Simplify right side
    218,936.20x = 47,336,458,525.44
  5. Step 5: Solve for x
    x = 47,336,458,525.44/218,936.20
  6. Step 6: Final answer
    x = 216,211.20

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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.