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Finding the Fourth Proportional to 1,080.62, 1,618.50 and 757.43

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Solution

The fourth proportional to 1,080.62, 1,618.50 and 757.43 is: 1,134.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080.62 : 1,618.50 = 757.43 : x
  2. Step 2: Convert to fraction form
    1,080.62/1,618.50 = 757.43/x
  3. Step 3: Cross multiply
    1,080.62x = 1,618.50 × 757.43
  4. Step 4: Simplify right side
    1,080.62x = 1,225,896.67
  5. Step 5: Solve for x
    x = 1,225,896.67/1,080.62
  6. Step 6: Final answer
    x = 1,134.44

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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.