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Finding the Fourth Proportional to 543.02, 749.23 and 321.84

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Solution

The fourth proportional to 543.02, 749.23 and 321.84 is: 444.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.02 : 749.23 = 321.84 : x
  2. Step 2: Convert to fraction form
    543.02/749.23 = 321.84/x
  3. Step 3: Cross multiply
    543.02x = 749.23 × 321.84
  4. Step 4: Simplify right side
    543.02x = 241,131.38
  5. Step 5: Solve for x
    x = 241,131.38/543.02
  6. Step 6: Final answer
    x = 444.06

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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.