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Finding the Fourth Proportional to 2,473.31, 3,709.92 and 992.87

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Solution

The fourth proportional to 2,473.31, 3,709.92 and 992.87 is: 1,489.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,473.31 : 3,709.92 = 992.87 : x
  2. Step 2: Convert to fraction form
    2,473.31/3,709.92 = 992.87/x
  3. Step 3: Cross multiply
    2,473.31x = 3,709.92 × 992.87
  4. Step 4: Simplify right side
    2,473.31x = 3,683,451.34
  5. Step 5: Solve for x
    x = 3,683,451.34/2,473.31
  6. Step 6: Final answer
    x = 1,489.28

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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.