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Finding the Fourth Proportional to 257,859.40, 386,789.10 and 187,000.60

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Solution

The fourth proportional to 257,859.40, 386,789.10 and 187,000.60 is: 280,500.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,859.40 : 386,789.10 = 187,000.60 : x
  2. Step 2: Convert to fraction form
    257,859.40/386,789.10 = 187,000.60/x
  3. Step 3: Cross multiply
    257,859.40x = 386,789.10 × 187,000.60
  4. Step 4: Simplify right side
    257,859.40x = 72,329,793,773.46
  5. Step 5: Solve for x
    x = 72,329,793,773.46/257,859.40
  6. Step 6: Final answer
    x = 280,500.90

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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.