Home / 1,721.73-2,582.64-423.18

Finding the Fourth Proportional to 1,721.73, 2,582.64 and 423.18

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Solution

The fourth proportional to 1,721.73, 2,582.64 and 423.18 is: 634.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.73 : 2,582.64 = 423.18 : x
  2. Step 2: Convert to fraction form
    1,721.73/2,582.64 = 423.18/x
  3. Step 3: Cross multiply
    1,721.73x = 2,582.64 × 423.18
  4. Step 4: Simplify right side
    1,721.73x = 1,092,921.60
  5. Step 5: Solve for x
    x = 1,092,921.60/1,721.73
  6. Step 6: Final answer
    x = 634.78

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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.