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Finding the Fourth Proportional to 620,433.45, 930,650.18 and 407,857.05

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Solution

The fourth proportional to 620,433.45, 930,650.18 and 407,857.05 is: 611,785.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,433.45 : 930,650.18 = 407,857.05 : x
  2. Step 2: Convert to fraction form
    620,433.45/930,650.18 = 407,857.05/x
  3. Step 3: Cross multiply
    620,433.45x = 930,650.18 × 407,857.05
  4. Step 4: Simplify right side
    620,433.45x = 379,572,234,957.48
  5. Step 5: Solve for x
    x = 379,572,234,957.48/620,433.45
  6. Step 6: Final answer
    x = 611,785.58

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Double scale
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Similar ratio
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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.