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Finding the Fourth Proportional to 1,105.11, 1,657.46 and 324.94

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Solution

The fourth proportional to 1,105.11, 1,657.46 and 324.94 is: 487.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,105.11 : 1,657.46 = 324.94 : x
  2. Step 2: Convert to fraction form
    1,105.11/1,657.46 = 324.94/x
  3. Step 3: Cross multiply
    1,105.11x = 1,657.46 × 324.94
  4. Step 4: Simplify right side
    1,105.11x = 538,575.05
  5. Step 5: Solve for x
    x = 538,575.05/1,105.11
  6. Step 6: Final answer
    x = 487.35

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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.