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Finding the Fourth Proportional to 546.06, 819.15 and 221.40

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Solution

The fourth proportional to 546.06, 819.15 and 221.40 is: 332.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.06 : 819.15 = 221.40 : x
  2. Step 2: Convert to fraction form
    546.06/819.15 = 221.40/x
  3. Step 3: Cross multiply
    546.06x = 819.15 × 221.40
  4. Step 4: Simplify right side
    546.06x = 181,359.81
  5. Step 5: Solve for x
    x = 181,359.81/546.06
  6. Step 6: Final answer
    x = 332.12

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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.