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Finding the Fourth Proportional to 1,323.63, 1,983.87 and 543.24

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Solution

The fourth proportional to 1,323.63, 1,983.87 and 543.24 is: 814.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,323.63 : 1,983.87 = 543.24 : x
  2. Step 2: Convert to fraction form
    1,323.63/1,983.87 = 543.24/x
  3. Step 3: Cross multiply
    1,323.63x = 1,983.87 × 543.24
  4. Step 4: Simplify right side
    1,323.63x = 1,077,717.54
  5. Step 5: Solve for x
    x = 1,077,717.54/1,323.63
  6. Step 6: Final answer
    x = 814.21

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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.