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Finding the Fourth Proportional to 543,605.40, 815,537.70 and 262,891.80

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Solution

The fourth proportional to 543,605.40, 815,537.70 and 262,891.80 is: 394,400.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,605.40 : 815,537.70 = 262,891.80 : x
  2. Step 2: Convert to fraction form
    543,605.40/815,537.70 = 262,891.80/x
  3. Step 3: Cross multiply
    543,605.40x = 815,537.70 × 262,891.80
  4. Step 4: Simplify right side
    543,605.40x = 214,398,173,920.86
  5. Step 5: Solve for x
    x = 214,398,173,920.86/543,605.40
  6. Step 6: Final answer
    x = 394,400.38

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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.