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Finding the Fourth Proportional to 621,179.55, 931,790.01 and 171,862.80

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Solution

The fourth proportional to 621,179.55, 931,790.01 and 171,862.80 is: 257,799.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,179.55 : 931,790.01 = 171,862.80 : x
  2. Step 2: Convert to fraction form
    621,179.55/931,790.01 = 171,862.80/x
  3. Step 3: Cross multiply
    621,179.55x = 931,790.01 × 171,862.80
  4. Step 4: Simplify right side
    621,179.55x = 160,140,037,280.90
  5. Step 5: Solve for x
    x = 160,140,037,280.90/621,179.55
  6. Step 6: Final answer
    x = 257,799.92

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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.