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Finding the Fourth Proportional to 386,691.85, 533,515.08 and 225,432.73

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Solution

The fourth proportional to 386,691.85, 533,515.08 and 225,432.73 is: 311,027.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,691.85 : 533,515.08 = 225,432.73 : x
  2. Step 2: Convert to fraction form
    386,691.85/533,515.08 = 225,432.73/x
  3. Step 3: Cross multiply
    386,691.85x = 533,515.08 × 225,432.73
  4. Step 4: Simplify right side
    386,691.85x = 120,271,760,980.57
  5. Step 5: Solve for x
    x = 120,271,760,980.57/386,691.85
  6. Step 6: Final answer
    x = 311,027.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.