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Finding the Fourth Proportional to 214,620.80, 322,190.40 and 213,065.60

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Solution

The fourth proportional to 214,620.80, 322,190.40 and 213,065.60 is: 319,855.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,620.80 : 322,190.40 = 213,065.60 : x
  2. Step 2: Convert to fraction form
    214,620.80/322,190.40 = 213,065.60/x
  3. Step 3: Cross multiply
    214,620.80x = 322,190.40 × 213,065.60
  4. Step 4: Simplify right side
    214,620.80x = 68,647,690,890.24
  5. Step 5: Solve for x
    x = 68,647,690,890.24/214,620.80
  6. Step 6: Final answer
    x = 319,855.72

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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.