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Finding the Fourth Proportional to 1,777.80, 2,664.30 and 681.08

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Solution

The fourth proportional to 1,777.80, 2,664.30 and 681.08 is: 1,020.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,777.80 : 2,664.30 = 681.08 : x
  2. Step 2: Convert to fraction form
    1,777.80/2,664.30 = 681.08/x
  3. Step 3: Cross multiply
    1,777.80x = 2,664.30 × 681.08
  4. Step 4: Simplify right side
    1,777.80x = 1,814,601.44
  5. Step 5: Solve for x
    x = 1,814,601.44/1,777.80
  6. Step 6: Final answer
    x = 1,020.70

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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.