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Finding the Fourth Proportional to 543,630.70, 815,446.05 and 431,656.30

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Solution

The fourth proportional to 543,630.70, 815,446.05 and 431,656.30 is: 647,484.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,630.70 : 815,446.05 = 431,656.30 : x
  2. Step 2: Convert to fraction form
    543,630.70/815,446.05 = 431,656.30/x
  3. Step 3: Cross multiply
    543,630.70x = 815,446.05 × 431,656.30
  4. Step 4: Simplify right side
    543,630.70x = 351,992,424,792.62
  5. Step 5: Solve for x
    x = 351,992,424,792.62/543,630.70
  6. Step 6: Final answer
    x = 647,484.45

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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.