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Finding the Fourth Proportional to 626,603.80, 939,905.70 and 389,824.60

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Solution

The fourth proportional to 626,603.80, 939,905.70 and 389,824.60 is: 584,736.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,603.80 : 939,905.70 = 389,824.60 : x
  2. Step 2: Convert to fraction form
    626,603.80/939,905.70 = 389,824.60/x
  3. Step 3: Cross multiply
    626,603.80x = 939,905.70 × 389,824.60
  4. Step 4: Simplify right side
    626,603.80x = 366,398,363,540.22
  5. Step 5: Solve for x
    x = 366,398,363,540.22/626,603.80
  6. Step 6: Final answer
    x = 584,736.90

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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.