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Finding the Fourth Proportional to 543,385.20, 815,077.80 and 341,306.40

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Solution

The fourth proportional to 543,385.20, 815,077.80 and 341,306.40 is: 511,959.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,385.20 : 815,077.80 = 341,306.40 : x
  2. Step 2: Convert to fraction form
    543,385.20/815,077.80 = 341,306.40/x
  3. Step 3: Cross multiply
    543,385.20x = 815,077.80 × 341,306.40
  4. Step 4: Simplify right side
    543,385.20x = 278,191,269,637.92
  5. Step 5: Solve for x
    x = 278,191,269,637.92/543,385.20
  6. Step 6: Final answer
    x = 511,959.60

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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.