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Finding the Fourth Proportional to 543.79, 749.21 and 450.03

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Solution

The fourth proportional to 543.79, 749.21 and 450.03 is: 620.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.79 : 749.21 = 450.03 : x
  2. Step 2: Convert to fraction form
    543.79/749.21 = 450.03/x
  3. Step 3: Cross multiply
    543.79x = 749.21 × 450.03
  4. Step 4: Simplify right side
    543.79x = 337,164.73
  5. Step 5: Solve for x
    x = 337,164.73/543.79
  6. Step 6: Final answer
    x = 620.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.