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Finding the Fourth Proportional to 1,721.47, 2,581.82 and 488.60

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Solution

The fourth proportional to 1,721.47, 2,581.82 and 488.60 is: 732.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.47 : 2,581.82 = 488.60 : x
  2. Step 2: Convert to fraction form
    1,721.47/2,581.82 = 488.60/x
  3. Step 3: Cross multiply
    1,721.47x = 2,581.82 × 488.60
  4. Step 4: Simplify right side
    1,721.47x = 1,261,477.25
  5. Step 5: Solve for x
    x = 1,261,477.25/1,721.47
  6. Step 6: Final answer
    x = 732.79

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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.