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Finding the Fourth Proportional to 619,631.86, 855,369.53 and 378,010.74

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Solution

The fourth proportional to 619,631.86, 855,369.53 and 378,010.74 is: 521,824.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,631.86 : 855,369.53 = 378,010.74 : x
  2. Step 2: Convert to fraction form
    619,631.86/855,369.53 = 378,010.74/x
  3. Step 3: Cross multiply
    619,631.86x = 855,369.53 × 378,010.74
  4. Step 4: Simplify right side
    619,631.86x = 323,338,869,008.75
  5. Step 5: Solve for x
    x = 323,338,869,008.75/619,631.86
  6. Step 6: Final answer
    x = 521,824.15

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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.