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Finding the Fourth Proportional to 1,704.52, 2,555.19 and 665.20

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Solution

The fourth proportional to 1,704.52, 2,555.19 and 665.20 is: 997.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,704.52 : 2,555.19 = 665.20 : x
  2. Step 2: Convert to fraction form
    1,704.52/2,555.19 = 665.20/x
  3. Step 3: Cross multiply
    1,704.52x = 2,555.19 × 665.20
  4. Step 4: Simplify right side
    1,704.52x = 1,699,712.39
  5. Step 5: Solve for x
    x = 1,699,712.39/1,704.52
  6. Step 6: Final answer
    x = 997.18

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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.