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Finding the Fourth Proportional to 1,931.97, 2,896.91 and 681.94

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Solution

The fourth proportional to 1,931.97, 2,896.91 and 681.94 is: 1,022.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,931.97 : 2,896.91 = 681.94 : x
  2. Step 2: Convert to fraction form
    1,931.97/2,896.91 = 681.94/x
  3. Step 3: Cross multiply
    1,931.97x = 2,896.91 × 681.94
  4. Step 4: Simplify right side
    1,931.97x = 1,975,518.81
  5. Step 5: Solve for x
    x = 1,975,518.81/1,931.97
  6. Step 6: Final answer
    x = 1,022.54

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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.