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Finding the Fourth Proportional to 638,174.77, 880,699.64 and 351,713.31

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Solution

The fourth proportional to 638,174.77, 880,699.64 and 351,713.31 is: 485,374.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,174.77 : 880,699.64 = 351,713.31 : x
  2. Step 2: Convert to fraction form
    638,174.77/880,699.64 = 351,713.31/x
  3. Step 3: Cross multiply
    638,174.77x = 880,699.64 × 351,713.31
  4. Step 4: Simplify right side
    638,174.77x = 309,753,780,439.02
  5. Step 5: Solve for x
    x = 309,753,780,439.02/638,174.77
  6. Step 6: Final answer
    x = 485,374.53

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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.