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Finding the Fourth Proportional to 543,142.80, 814,714.20 and 291,200.40

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Solution

The fourth proportional to 543,142.80, 814,714.20 and 291,200.40 is: 436,800.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,142.80 : 814,714.20 = 291,200.40 : x
  2. Step 2: Convert to fraction form
    543,142.80/814,714.20 = 291,200.40/x
  3. Step 3: Cross multiply
    543,142.80x = 814,714.20 × 291,200.40
  4. Step 4: Simplify right side
    543,142.80x = 237,245,100,925.68
  5. Step 5: Solve for x
    x = 237,245,100,925.68/543,142.80
  6. Step 6: Final answer
    x = 436,800.60

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Double scale
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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.