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Finding the Fourth Proportional to 393,720.58, 543,329.66 and 223,954.30

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Solution

The fourth proportional to 393,720.58, 543,329.66 and 223,954.30 is: 309,054.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,720.58 : 543,329.66 = 223,954.30 : x
  2. Step 2: Convert to fraction form
    393,720.58/543,329.66 = 223,954.30/x
  3. Step 3: Cross multiply
    393,720.58x = 543,329.66 × 223,954.30
  4. Step 4: Simplify right side
    393,720.58x = 121,681,013,674.54
  5. Step 5: Solve for x
    x = 121,681,013,674.54/393,720.58
  6. Step 6: Final answer
    x = 309,054.24

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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.