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Finding the Fourth Proportional to 1,721.54, 2,581.98 and 488.66

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Solution

The fourth proportional to 1,721.54, 2,581.98 and 488.66 is: 732.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.54 : 2,581.98 = 488.66 : x
  2. Step 2: Convert to fraction form
    1,721.54/2,581.98 = 488.66/x
  3. Step 3: Cross multiply
    1,721.54x = 2,581.98 × 488.66
  4. Step 4: Simplify right side
    1,721.54x = 1,261,710.35
  5. Step 5: Solve for x
    x = 1,261,710.35/1,721.54
  6. Step 6: Final answer
    x = 732.90

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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.