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Finding the Fourth Proportional to 621,874.80, 931,429.80 and 538,930.80

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Solution

The fourth proportional to 621,874.80, 931,429.80 and 538,930.80 is: 807,198.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,874.80 : 931,429.80 = 538,930.80 : x
  2. Step 2: Convert to fraction form
    621,874.80/931,429.80 = 538,930.80/x
  3. Step 3: Cross multiply
    621,874.80x = 931,429.80 × 538,930.80
  4. Step 4: Simplify right side
    621,874.80x = 501,976,207,257.84
  5. Step 5: Solve for x
    x = 501,976,207,257.84/621,874.80
  6. Step 6: Final answer
    x = 807,198.18

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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.