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Finding the Fourth Proportional to 547.06, 819.15 and 418.90

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Solution

The fourth proportional to 547.06, 819.15 and 418.90 is: 627.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.06 : 819.15 = 418.90 : x
  2. Step 2: Convert to fraction form
    547.06/819.15 = 418.90/x
  3. Step 3: Cross multiply
    547.06x = 819.15 × 418.90
  4. Step 4: Simplify right side
    547.06x = 343,141.94
  5. Step 5: Solve for x
    x = 343,141.94/547.06
  6. Step 6: Final answer
    x = 627.25

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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.