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Finding the Fourth Proportional to 542.63, 814.16 and 213.66

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Solution

The fourth proportional to 542.63, 814.16 and 213.66 is: 320.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.63 : 814.16 = 213.66 : x
  2. Step 2: Convert to fraction form
    542.63/814.16 = 213.66/x
  3. Step 3: Cross multiply
    542.63x = 814.16 × 213.66
  4. Step 4: Simplify right side
    542.63x = 173,952.36
  5. Step 5: Solve for x
    x = 173,952.36/542.63
  6. Step 6: Final answer
    x = 320.58

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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.