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Finding the Fourth Proportional to 620,105.20, 930,157.80 and 611,810.80

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Solution

The fourth proportional to 620,105.20, 930,157.80 and 611,810.80 is: 917,716.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,105.20 : 930,157.80 = 611,810.80 : x
  2. Step 2: Convert to fraction form
    620,105.20/930,157.80 = 611,810.80/x
  3. Step 3: Cross multiply
    620,105.20x = 930,157.80 × 611,810.80
  4. Step 4: Simplify right side
    620,105.20x = 569,080,587,744.24
  5. Step 5: Solve for x
    x = 569,080,587,744.24/620,105.20
  6. Step 6: Final answer
    x = 917,716.20

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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.