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Finding the Fourth Proportional to 1,375.71, 2,063.87 and 682.76

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Solution

The fourth proportional to 1,375.71, 2,063.87 and 682.76 is: 1,024.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,375.71 : 2,063.87 = 682.76 : x
  2. Step 2: Convert to fraction form
    1,375.71/2,063.87 = 682.76/x
  3. Step 3: Cross multiply
    1,375.71x = 2,063.87 × 682.76
  4. Step 4: Simplify right side
    1,375.71x = 1,409,127.88
  5. Step 5: Solve for x
    x = 1,409,127.88/1,375.71
  6. Step 6: Final answer
    x = 1,024.29

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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.