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Finding the Fourth Proportional to 547.96, 820.59 and 425.20

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Solution

The fourth proportional to 547.96, 820.59 and 425.20 is: 636.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.96 : 820.59 = 425.20 : x
  2. Step 2: Convert to fraction form
    547.96/820.59 = 425.20/x
  3. Step 3: Cross multiply
    547.96x = 820.59 × 425.20
  4. Step 4: Simplify right side
    547.96x = 348,914.87
  5. Step 5: Solve for x
    x = 348,914.87/547.96
  6. Step 6: Final answer
    x = 636.75

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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.