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Finding the Fourth Proportional to 513,998.10, 770,912.10 and 172,437.30

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Solution

The fourth proportional to 513,998.10, 770,912.10 and 172,437.30 is: 258,627.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,998.10 : 770,912.10 = 172,437.30 : x
  2. Step 2: Convert to fraction form
    513,998.10/770,912.10 = 172,437.30/x
  3. Step 3: Cross multiply
    513,998.10x = 770,912.10 × 172,437.30
  4. Step 4: Simplify right side
    513,998.10x = 132,934,001,061.33
  5. Step 5: Solve for x
    x = 132,934,001,061.33/513,998.10
  6. Step 6: Final answer
    x = 258,627.42

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Double scale
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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.