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Finding the Fourth Proportional to 1,323.21, 1,984.36 and 543.00

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Solution

The fourth proportional to 1,323.21, 1,984.36 and 543.00 is: 814.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,323.21 : 1,984.36 = 543.00 : x
  2. Step 2: Convert to fraction form
    1,323.21/1,984.36 = 543.00/x
  3. Step 3: Cross multiply
    1,323.21x = 1,984.36 × 543.00
  4. Step 4: Simplify right side
    1,323.21x = 1,077,498.92
  5. Step 5: Solve for x
    x = 1,077,498.92/1,323.21
  6. Step 6: Final answer
    x = 814.31

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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.