Home / 259,265.40-388,898.10-221,211.60

Finding the Fourth Proportional to 259,265.40, 388,898.10 and 221,211.60

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Solution

The fourth proportional to 259,265.40, 388,898.10 and 221,211.60 is: 331,817.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,265.40 : 388,898.10 = 221,211.60 : x
  2. Step 2: Convert to fraction form
    259,265.40/388,898.10 = 221,211.60/x
  3. Step 3: Cross multiply
    259,265.40x = 388,898.10 × 221,211.60
  4. Step 4: Simplify right side
    259,265.40x = 86,028,770,937.96
  5. Step 5: Solve for x
    x = 86,028,770,937.96/259,265.40
  6. Step 6: Final answer
    x = 331,817.40

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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.