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Finding the Fourth Proportional to 1,806.45, 2,709.46 and 766.62

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Solution

The fourth proportional to 1,806.45, 2,709.46 and 766.62 is: 1,149.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,806.45 : 2,709.46 = 766.62 : x
  2. Step 2: Convert to fraction form
    1,806.45/2,709.46 = 766.62/x
  3. Step 3: Cross multiply
    1,806.45x = 2,709.46 × 766.62
  4. Step 4: Simplify right side
    1,806.45x = 2,077,126.23
  5. Step 5: Solve for x
    x = 2,077,126.23/1,806.45
  6. Step 6: Final answer
    x = 1,149.84

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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.