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Finding the Fourth Proportional to 1,105.11, 1,655.24 and 455.09

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Solution

The fourth proportional to 1,105.11, 1,655.24 and 455.09 is: 681.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,105.11 : 1,655.24 = 455.09 : x
  2. Step 2: Convert to fraction form
    1,105.11/1,655.24 = 455.09/x
  3. Step 3: Cross multiply
    1,105.11x = 1,655.24 × 455.09
  4. Step 4: Simplify right side
    1,105.11x = 753,272.62
  5. Step 5: Solve for x
    x = 753,272.62/1,105.11
  6. Step 6: Final answer
    x = 681.63

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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.