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Finding the Fourth Proportional to 547.54, 821.32 and 305.61

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Solution

The fourth proportional to 547.54, 821.32 and 305.61 is: 458.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.54 : 821.32 = 305.61 : x
  2. Step 2: Convert to fraction form
    547.54/821.32 = 305.61/x
  3. Step 3: Cross multiply
    547.54x = 821.32 × 305.61
  4. Step 4: Simplify right side
    547.54x = 250,999.76
  5. Step 5: Solve for x
    x = 250,999.76/547.54
  6. Step 6: Final answer
    x = 458.42

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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.