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Finding the Fourth Proportional to 1,722.97, 2,582.67 and 681.55

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Solution

The fourth proportional to 1,722.97, 2,582.67 and 681.55 is: 1,021.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,722.97 : 2,582.67 = 681.55 : x
  2. Step 2: Convert to fraction form
    1,722.97/2,582.67 = 681.55/x
  3. Step 3: Cross multiply
    1,722.97x = 2,582.67 × 681.55
  4. Step 4: Simplify right side
    1,722.97x = 1,760,218.74
  5. Step 5: Solve for x
    x = 1,760,218.74/1,722.97
  6. Step 6: Final answer
    x = 1,021.62

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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.