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Finding the Fourth Proportional to 542.21, 813.41 and 253.64

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Solution

The fourth proportional to 542.21, 813.41 and 253.64 is: 380.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.21 : 813.41 = 253.64 : x
  2. Step 2: Convert to fraction form
    542.21/813.41 = 253.64/x
  3. Step 3: Cross multiply
    542.21x = 813.41 × 253.64
  4. Step 4: Simplify right side
    542.21x = 206,314.08
  5. Step 5: Solve for x
    x = 206,314.08/542.21
  6. Step 6: Final answer
    x = 380.51

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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.