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Finding the Fourth Proportional to 542.93, 749.20 and 303.63

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Solution

The fourth proportional to 542.93, 749.20 and 303.63 is: 418.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.93 : 749.20 = 303.63 : x
  2. Step 2: Convert to fraction form
    542.93/749.20 = 303.63/x
  3. Step 3: Cross multiply
    542.93x = 749.20 × 303.63
  4. Step 4: Simplify right side
    542.93x = 227,481.47
  5. Step 5: Solve for x
    x = 227,481.47/542.93
  6. Step 6: Final answer
    x = 418.99

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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.