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Finding the Fourth Proportional to 617,445.36, 851,257.80 and 445,219.20

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Solution

The fourth proportional to 617,445.36, 851,257.80 and 445,219.20 is: 613,813.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,445.36 : 851,257.80 = 445,219.20 : x
  2. Step 2: Convert to fraction form
    617,445.36/851,257.80 = 445,219.20/x
  3. Step 3: Cross multiply
    617,445.36x = 851,257.80 × 445,219.20
  4. Step 4: Simplify right side
    617,445.36x = 378,996,316,709.76
  5. Step 5: Solve for x
    x = 378,996,316,709.76/617,445.36
  6. Step 6: Final answer
    x = 613,813.53

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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.