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Finding the Fourth Proportional to 339,870.20, 509,222.10 and 221,480.60

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Solution

The fourth proportional to 339,870.20, 509,222.10 and 221,480.60 is: 331,840.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,870.20 : 509,222.10 = 221,480.60 : x
  2. Step 2: Convert to fraction form
    339,870.20/509,222.10 = 221,480.60/x
  3. Step 3: Cross multiply
    339,870.20x = 509,222.10 × 221,480.60
  4. Step 4: Simplify right side
    339,870.20x = 112,782,816,241.26
  5. Step 5: Solve for x
    x = 112,782,816,241.26/339,870.20
  6. Step 6: Final answer
    x = 331,840.85

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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.