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Finding the Fourth Proportional to 621,078.30, 931,726.80 and 221,950.80

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Solution

The fourth proportional to 621,078.30, 931,726.80 and 221,950.80 is: 332,965.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,078.30 : 931,726.80 = 221,950.80 : x
  2. Step 2: Convert to fraction form
    621,078.30/931,726.80 = 221,950.80/x
  3. Step 3: Cross multiply
    621,078.30x = 931,726.80 × 221,950.80
  4. Step 4: Simplify right side
    621,078.30x = 206,797,508,641.44
  5. Step 5: Solve for x
    x = 206,797,508,641.44/621,078.30
  6. Step 6: Final answer
    x = 332,965.28

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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.