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Finding the Fourth Proportional to 1,776.28, 2,664.59 and 681.56

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Solution

The fourth proportional to 1,776.28, 2,664.59 and 681.56 is: 1,022.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,776.28 : 2,664.59 = 681.56 : x
  2. Step 2: Convert to fraction form
    1,776.28/2,664.59 = 681.56/x
  3. Step 3: Cross multiply
    1,776.28x = 2,664.59 × 681.56
  4. Step 4: Simplify right side
    1,776.28x = 1,816,077.96
  5. Step 5: Solve for x
    x = 1,816,077.96/1,776.28
  6. Step 6: Final answer
    x = 1,022.41

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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.