Home / 621,121.28-931,878.80-221,753.20

Finding the Fourth Proportional to 621,121.28, 931,878.80 and 221,753.20

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Solution

The fourth proportional to 621,121.28, 931,878.80 and 221,753.20 is: 332,700.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,121.28 : 931,878.80 = 221,753.20 : x
  2. Step 2: Convert to fraction form
    621,121.28/931,878.80 = 221,753.20/x
  3. Step 3: Cross multiply
    621,121.28x = 931,878.80 × 221,753.20
  4. Step 4: Simplify right side
    621,121.28x = 206,647,105,912.16
  5. Step 5: Solve for x
    x = 206,647,105,912.16/621,121.28
  6. Step 6: Final answer
    x = 332,700.09

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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.