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Finding the Fourth Proportional to 393,718.32, 590,671.53 and 127,479.12

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Solution

The fourth proportional to 393,718.32, 590,671.53 and 127,479.12 is: 191,249.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,718.32 : 590,671.53 = 127,479.12 : x
  2. Step 2: Convert to fraction form
    393,718.32/590,671.53 = 127,479.12/x
  3. Step 3: Cross multiply
    393,718.32x = 590,671.53 × 127,479.12
  4. Step 4: Simplify right side
    393,718.32x = 75,298,286,853.45
  5. Step 5: Solve for x
    x = 75,298,286,853.45/393,718.32
  6. Step 6: Final answer
    x = 191,249.13

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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.