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Finding the Fourth Proportional to 393,531.36, 543,070.74 and 223,765.47

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Solution

The fourth proportional to 393,531.36, 543,070.74 and 223,765.47 is: 308,794.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,531.36 : 543,070.74 = 223,765.47 : x
  2. Step 2: Convert to fraction form
    393,531.36/543,070.74 = 223,765.47/x
  3. Step 3: Cross multiply
    393,531.36x = 543,070.74 × 223,765.47
  4. Step 4: Simplify right side
    393,531.36x = 121,520,479,379.35
  5. Step 5: Solve for x
    x = 121,520,479,379.35/393,531.36
  6. Step 6: Final answer
    x = 308,794.91

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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.