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Finding the Fourth Proportional to 542.56, 814.10 and 399.44

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Solution

The fourth proportional to 542.56, 814.10 and 399.44 is: 599.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.56 : 814.10 = 399.44 : x
  2. Step 2: Convert to fraction form
    542.56/814.10 = 399.44/x
  3. Step 3: Cross multiply
    542.56x = 814.10 × 399.44
  4. Step 4: Simplify right side
    542.56x = 325,184.10
  5. Step 5: Solve for x
    x = 325,184.10/542.56
  6. Step 6: Final answer
    x = 599.35

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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.