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Finding the Fourth Proportional to 1,704.80, 2,555.76 and 664.22

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Solution

The fourth proportional to 1,704.80, 2,555.76 and 664.22 is: 995.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,704.80 : 2,555.76 = 664.22 : x
  2. Step 2: Convert to fraction form
    1,704.80/2,555.76 = 664.22/x
  3. Step 3: Cross multiply
    1,704.80x = 2,555.76 × 664.22
  4. Step 4: Simplify right side
    1,704.80x = 1,697,586.91
  5. Step 5: Solve for x
    x = 1,697,586.91/1,704.80
  6. Step 6: Final answer
    x = 995.77

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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.