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Finding the Fourth Proportional to 620,288.20, 930,432.30 and 199,606.60

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Solution

The fourth proportional to 620,288.20, 930,432.30 and 199,606.60 is: 299,409.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,288.20 : 930,432.30 = 199,606.60 : x
  2. Step 2: Convert to fraction form
    620,288.20/930,432.30 = 199,606.60/x
  3. Step 3: Cross multiply
    620,288.20x = 930,432.30 × 199,606.60
  4. Step 4: Simplify right side
    620,288.20x = 185,720,427,933.18
  5. Step 5: Solve for x
    x = 185,720,427,933.18/620,288.20
  6. Step 6: Final answer
    x = 299,409.90

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Similar ratio
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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.