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Finding the Fourth Proportional to 546.19, 819.47 and 221.65

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Solution

The fourth proportional to 546.19, 819.47 and 221.65 is: 332.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.19 : 819.47 = 221.65 : x
  2. Step 2: Convert to fraction form
    546.19/819.47 = 221.65/x
  3. Step 3: Cross multiply
    546.19x = 819.47 × 221.65
  4. Step 4: Simplify right side
    546.19x = 181,635.53
  5. Step 5: Solve for x
    x = 181,635.53/546.19
  6. Step 6: Final answer
    x = 332.55

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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.