Home / 621,210.80-931,816.20-221,864.60

Finding the Fourth Proportional to 621,210.80, 931,816.20 and 221,864.60

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Solution

The fourth proportional to 621,210.80, 931,816.20 and 221,864.60 is: 332,796.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,210.80 : 931,816.20 = 221,864.60 : x
  2. Step 2: Convert to fraction form
    621,210.80/931,816.20 = 221,864.60/x
  3. Step 3: Cross multiply
    621,210.80x = 931,816.20 × 221,864.60
  4. Step 4: Simplify right side
    621,210.80x = 206,737,028,486.52
  5. Step 5: Solve for x
    x = 206,737,028,486.52/621,210.80
  6. Step 6: Final answer
    x = 332,796.90

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1.5x scale

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.