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Finding the Fourth Proportional to 1,721.88, 2,582.82 and 423.36

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Solution

The fourth proportional to 1,721.88, 2,582.82 and 423.36 is: 635.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.88 : 2,582.82 = 423.36 : x
  2. Step 2: Convert to fraction form
    1,721.88/2,582.82 = 423.36/x
  3. Step 3: Cross multiply
    1,721.88x = 2,582.82 × 423.36
  4. Step 4: Simplify right side
    1,721.88x = 1,093,462.68
  5. Step 5: Solve for x
    x = 1,093,462.68/1,721.88
  6. Step 6: Final answer
    x = 635.04

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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.