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Finding the Fourth Proportional to 543,172.80, 814,759.20 and 291,230.40

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Solution

The fourth proportional to 543,172.80, 814,759.20 and 291,230.40 is: 436,845.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,172.80 : 814,759.20 = 291,230.40 : x
  2. Step 2: Convert to fraction form
    543,172.80/814,759.20 = 291,230.40/x
  3. Step 3: Cross multiply
    543,172.80x = 814,759.20 × 291,230.40
  4. Step 4: Simplify right side
    543,172.80x = 237,282,647,719.68
  5. Step 5: Solve for x
    x = 237,282,647,719.68/543,172.80
  6. Step 6: Final answer
    x = 436,845.60

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Similar ratio
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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.