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Finding the Fourth Proportional to 257,771.61, 386,607.35 and 129,653.73

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Solution

The fourth proportional to 257,771.61, 386,607.35 and 129,653.73 is: 194,455.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,771.61 : 386,607.35 = 129,653.73 : x
  2. Step 2: Convert to fraction form
    257,771.61/386,607.35 = 129,653.73/x
  3. Step 3: Cross multiply
    257,771.61x = 386,607.35 × 129,653.73
  4. Step 4: Simplify right side
    257,771.61x = 50,125,086,066.97
  5. Step 5: Solve for x
    x = 50,125,086,066.97/257,771.61
  6. Step 6: Final answer
    x = 194,455.42

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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.