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Finding the Fourth Proportional to 620,186.20, 930,279.30 and 570,419.80

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Solution

The fourth proportional to 620,186.20, 930,279.30 and 570,419.80 is: 855,629.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,186.20 : 930,279.30 = 570,419.80 : x
  2. Step 2: Convert to fraction form
    620,186.20/930,279.30 = 570,419.80/x
  3. Step 3: Cross multiply
    620,186.20x = 930,279.30 × 570,419.80
  4. Step 4: Simplify right side
    620,186.20x = 530,649,732,250.14
  5. Step 5: Solve for x
    x = 530,649,732,250.14/620,186.20
  6. Step 6: Final answer
    x = 855,629.70

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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.