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Finding the Fourth Proportional to 393,513.52, 542,993.88 and 223,728.88

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Solution

The fourth proportional to 393,513.52, 542,993.88 and 223,728.88 is: 308,714.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,513.52 : 542,993.88 = 223,728.88 : x
  2. Step 2: Convert to fraction form
    393,513.52/542,993.88 = 223,728.88/x
  3. Step 3: Cross multiply
    393,513.52x = 542,993.88 × 223,728.88
  4. Step 4: Simplify right side
    393,513.52x = 121,483,412,619.25
  5. Step 5: Solve for x
    x = 121,483,412,619.25/393,513.52
  6. Step 6: Final answer
    x = 308,714.71

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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.