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Finding the Fourth Proportional to 393,718.58, 543,326.90 and 223,952.30

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Solution

The fourth proportional to 393,718.58, 543,326.90 and 223,952.30 is: 309,051.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,718.58 : 543,326.90 = 223,952.30 : x
  2. Step 2: Convert to fraction form
    393,718.58/543,326.90 = 223,952.30/x
  3. Step 3: Cross multiply
    393,718.58x = 543,326.90 × 223,952.30
  4. Step 4: Simplify right side
    393,718.58x = 121,679,308,906.87
  5. Step 5: Solve for x
    x = 121,679,308,906.87/393,718.58
  6. Step 6: Final answer
    x = 309,051.48

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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.