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Finding the Fourth Proportional to 612,740.90, 844,988.73 and 408,800.12

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Solution

The fourth proportional to 612,740.90, 844,988.73 and 408,800.12 is: 563,748.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,740.90 : 844,988.73 = 408,800.12 : x
  2. Step 2: Convert to fraction form
    612,740.90/844,988.73 = 408,800.12/x
  3. Step 3: Cross multiply
    612,740.90x = 844,988.73 × 408,800.12
  4. Step 4: Simplify right side
    612,740.90x = 345,431,489,997.70
  5. Step 5: Solve for x
    x = 345,431,489,997.70/612,740.90
  6. Step 6: Final answer
    x = 563,748.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.