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Finding the Fourth Proportional to 619,713.78, 855,984.51 and 511,211.30

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Solution

The fourth proportional to 619,713.78, 855,984.51 and 511,211.30 is: 706,114.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,713.78 : 855,984.51 = 511,211.30 : x
  2. Step 2: Convert to fraction form
    619,713.78/855,984.51 = 511,211.30/x
  3. Step 3: Cross multiply
    619,713.78x = 855,984.51 × 511,211.30
  4. Step 4: Simplify right side
    619,713.78x = 437,588,954,136.96
  5. Step 5: Solve for x
    x = 437,588,954,136.96/619,713.78
  6. Step 6: Final answer
    x = 706,114.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.