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Finding the Fourth Proportional to 393,718.82, 590,672.28 and 127,479.62

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Solution

The fourth proportional to 393,718.82, 590,672.28 and 127,479.62 is: 191,249.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,718.82 : 590,672.28 = 127,479.62 : x
  2. Step 2: Convert to fraction form
    393,718.82/590,672.28 = 127,479.62/x
  3. Step 3: Cross multiply
    393,718.82x = 590,672.28 × 127,479.62
  4. Step 4: Simplify right side
    393,718.82x = 75,298,677,798.93
  5. Step 5: Solve for x
    x = 75,298,677,798.93/393,718.82
  6. Step 6: Final answer
    x = 191,249.88

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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.