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Finding the Fourth Proportional to 542.74, 813.87 and 172.44

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Solution

The fourth proportional to 542.74, 813.87 and 172.44 is: 258.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.74 : 813.87 = 172.44 : x
  2. Step 2: Convert to fraction form
    542.74/813.87 = 172.44/x
  3. Step 3: Cross multiply
    542.74x = 813.87 × 172.44
  4. Step 4: Simplify right side
    542.74x = 140,343.74
  5. Step 5: Solve for x
    x = 140,343.74/542.74
  6. Step 6: Final answer
    x = 258.58

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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.