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Finding the Fourth Proportional to 546.20, 819.30 and 257.48

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Solution

The fourth proportional to 546.20, 819.30 and 257.48 is: 386.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.20 : 819.30 = 257.48 : x
  2. Step 2: Convert to fraction form
    546.20/819.30 = 257.48/x
  3. Step 3: Cross multiply
    546.20x = 819.30 × 257.48
  4. Step 4: Simplify right side
    546.20x = 210,953.36
  5. Step 5: Solve for x
    x = 210,953.36/546.20
  6. Step 6: Final answer
    x = 386.22

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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.