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Finding the Fourth Proportional to 1,721.92, 2,583.94 and 681.75

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Solution

The fourth proportional to 1,721.92, 2,583.94 and 681.75 is: 1,023.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.92 : 2,583.94 = 681.75 : x
  2. Step 2: Convert to fraction form
    1,721.92/2,583.94 = 681.75/x
  3. Step 3: Cross multiply
    1,721.92x = 2,583.94 × 681.75
  4. Step 4: Simplify right side
    1,721.92x = 1,761,601.10
  5. Step 5: Solve for x
    x = 1,761,601.10/1,721.92
  6. Step 6: Final answer
    x = 1,023.04

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1.5x scale

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.