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Finding the Fourth Proportional to 619,239.60, 927,984.60 and 458,057.70

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Solution

The fourth proportional to 619,239.60, 927,984.60 and 458,057.70 is: 686,439.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,239.60 : 927,984.60 = 458,057.70 : x
  2. Step 2: Convert to fraction form
    619,239.60/927,984.60 = 458,057.70/x
  3. Step 3: Cross multiply
    619,239.60x = 927,984.60 × 458,057.70
  4. Step 4: Simplify right side
    619,239.60x = 425,070,491,511.42
  5. Step 5: Solve for x
    x = 425,070,491,511.42/619,239.60
  6. Step 6: Final answer
    x = 686,439.45

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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.