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Finding the Fourth Proportional to 259,772.40, 389,658.60 and 221,718.60

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Solution

The fourth proportional to 259,772.40, 389,658.60 and 221,718.60 is: 332,577.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,772.40 : 389,658.60 = 221,718.60 : x
  2. Step 2: Convert to fraction form
    259,772.40/389,658.60 = 221,718.60/x
  3. Step 3: Cross multiply
    259,772.40x = 389,658.60 × 221,718.60
  4. Step 4: Simplify right side
    259,772.40x = 86,394,559,269.96
  5. Step 5: Solve for x
    x = 86,394,559,269.96/259,772.40
  6. Step 6: Final answer
    x = 332,577.90

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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.