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Finding the Fourth Proportional to 3,339.68, 5,009.70 and 1,031

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Solution

The fourth proportional to 3,339.68, 5,009.70 and 1,031 is: 1,546.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,339.68 : 5,009.70 = 1,031 : x
  2. Step 2: Convert to fraction form
    3,339.68/5,009.70 = 1,031/x
  3. Step 3: Cross multiply
    3,339.68x = 5,009.70 × 1,031
  4. Step 4: Simplify right side
    3,339.68x = 5,165,000.70
  5. Step 5: Solve for x
    x = 5,165,000.70/3,339.68
  6. Step 6: Final answer
    x = 1,546.56

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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.