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Finding the Fourth Proportional to 621,180, 931,790.73 and 171,863.28

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Solution

The fourth proportional to 621,180, 931,790.73 and 171,863.28 is: 257,800.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,180 : 931,790.73 = 171,863.28 : x
  2. Step 2: Convert to fraction form
    621,180/931,790.73 = 171,863.28/x
  3. Step 3: Cross multiply
    621,180x = 931,790.73 × 171,863.28
  4. Step 4: Simplify right side
    621,180x = 160,140,611,131.39
  5. Step 5: Solve for x
    x = 160,140,611,131.39/621,180
  6. Step 6: Final answer
    x = 257,800.66

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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.