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Finding the Fourth Proportional to 542.89, 749.23 and 321.89

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Solution

The fourth proportional to 542.89, 749.23 and 321.89 is: 444.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.89 : 749.23 = 321.89 : x
  2. Step 2: Convert to fraction form
    542.89/749.23 = 321.89/x
  3. Step 3: Cross multiply
    542.89x = 749.23 × 321.89
  4. Step 4: Simplify right side
    542.89x = 241,169.64
  5. Step 5: Solve for x
    x = 241,169.64/542.89
  6. Step 6: Final answer
    x = 444.23

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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.