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Finding the Fourth Proportional to 1,201.03, 1,801.09 and 543.10

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Solution

The fourth proportional to 1,201.03, 1,801.09 and 543.10 is: 814.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,201.03 : 1,801.09 = 543.10 : x
  2. Step 2: Convert to fraction form
    1,201.03/1,801.09 = 543.10/x
  3. Step 3: Cross multiply
    1,201.03x = 1,801.09 × 543.10
  4. Step 4: Simplify right side
    1,201.03x = 978,171.98
  5. Step 5: Solve for x
    x = 978,171.98/1,201.03
  6. Step 6: Final answer
    x = 814.44

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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.