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Finding the Fourth Proportional to 543,910.20, 815,087.70 and 400,637.40

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Solution

The fourth proportional to 543,910.20, 815,087.70 and 400,637.40 is: 600,383.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,910.20 : 815,087.70 = 400,637.40 : x
  2. Step 2: Convert to fraction form
    543,910.20/815,087.70 = 400,637.40/x
  3. Step 3: Cross multiply
    543,910.20x = 815,087.70 × 400,637.40
  4. Step 4: Simplify right side
    543,910.20x = 326,554,616,899.98
  5. Step 5: Solve for x
    x = 326,554,616,899.98/543,910.20
  6. Step 6: Final answer
    x = 600,383.33

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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.