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Finding the Fourth Proportional to 617,090.76, 851,664.12 and 345,173.76

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Solution

The fourth proportional to 617,090.76, 851,664.12 and 345,173.76 is: 476,383.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,090.76 : 851,664.12 = 345,173.76 : x
  2. Step 2: Convert to fraction form
    617,090.76/851,664.12 = 345,173.76/x
  3. Step 3: Cross multiply
    617,090.76x = 851,664.12 × 345,173.76
  4. Step 4: Simplify right side
    617,090.76x = 293,972,106,557.49
  5. Step 5: Solve for x
    x = 293,972,106,557.49/617,090.76
  6. Step 6: Final answer
    x = 476,383.91

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Double scale
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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.