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Finding the Fourth Proportional to 386,360.80, 579,541.20 and 173,128.30

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Solution

The fourth proportional to 386,360.80, 579,541.20 and 173,128.30 is: 259,692.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,360.80 : 579,541.20 = 173,128.30 : x
  2. Step 2: Convert to fraction form
    386,360.80/579,541.20 = 173,128.30/x
  3. Step 3: Cross multiply
    386,360.80x = 579,541.20 × 173,128.30
  4. Step 4: Simplify right side
    386,360.80x = 100,334,982,735.96
  5. Step 5: Solve for x
    x = 100,334,982,735.96/386,360.80
  6. Step 6: Final answer
    x = 259,692.45

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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.