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Finding the Fourth Proportional to 620,614.10, 930,921.15 and 408,037.70

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Solution

The fourth proportional to 620,614.10, 930,921.15 and 408,037.70 is: 612,056.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,614.10 : 930,921.15 = 408,037.70 : x
  2. Step 2: Convert to fraction form
    620,614.10/930,921.15 = 408,037.70/x
  3. Step 3: Cross multiply
    620,614.10x = 930,921.15 × 408,037.70
  4. Step 4: Simplify right side
    620,614.10x = 379,850,924,927.36
  5. Step 5: Solve for x
    x = 379,850,924,927.36/620,614.10
  6. Step 6: Final answer
    x = 612,056.55

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Similar ratio
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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.