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Finding the Fourth Proportional to 1,093.26, 1,640.16 and 323.76

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Solution

The fourth proportional to 1,093.26, 1,640.16 and 323.76 is: 485.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,093.26 : 1,640.16 = 323.76 : x
  2. Step 2: Convert to fraction form
    1,093.26/1,640.16 = 323.76/x
  3. Step 3: Cross multiply
    1,093.26x = 1,640.16 × 323.76
  4. Step 4: Simplify right side
    1,093.26x = 531,018.20
  5. Step 5: Solve for x
    x = 531,018.20/1,093.26
  6. Step 6: Final answer
    x = 485.72

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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.