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Finding the Fourth Proportional to 547.20, 820.84 and 316.48

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Solution

The fourth proportional to 547.20, 820.84 and 316.48 is: 474.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.20 : 820.84 = 316.48 : x
  2. Step 2: Convert to fraction form
    547.20/820.84 = 316.48/x
  3. Step 3: Cross multiply
    547.20x = 820.84 × 316.48
  4. Step 4: Simplify right side
    547.20x = 259,779.44
  5. Step 5: Solve for x
    x = 259,779.44/547.20
  6. Step 6: Final answer
    x = 474.74

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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.