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Finding the Fourth Proportional to 619,487.44, 855,153.64 and 418,555.60

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Solution

The fourth proportional to 619,487.44, 855,153.64 and 418,555.60 is: 577,783.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,487.44 : 855,153.64 = 418,555.60 : x
  2. Step 2: Convert to fraction form
    619,487.44/855,153.64 = 418,555.60/x
  3. Step 3: Cross multiply
    619,487.44x = 855,153.64 × 418,555.60
  4. Step 4: Simplify right side
    619,487.44x = 357,929,344,882.38
  5. Step 5: Solve for x
    x = 357,929,344,882.38/619,487.44
  6. Step 6: Final answer
    x = 577,783.05

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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.