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Finding the Fourth Proportional to 665,622.60, 998,433.90 and 658,624.20

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Solution

The fourth proportional to 665,622.60, 998,433.90 and 658,624.20 is: 987,936.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,622.60 : 998,433.90 = 658,624.20 : x
  2. Step 2: Convert to fraction form
    665,622.60/998,433.90 = 658,624.20/x
  3. Step 3: Cross multiply
    665,622.60x = 998,433.90 × 658,624.20
  4. Step 4: Simplify right side
    665,622.60x = 657,592,728,640.38
  5. Step 5: Solve for x
    x = 657,592,728,640.38/665,622.60
  6. Step 6: Final answer
    x = 987,936.30

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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.