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Finding the Fourth Proportional to 547.89, 821.90 and 223.48

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Solution

The fourth proportional to 547.89, 821.90 and 223.48 is: 335.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.89 : 821.90 = 223.48 : x
  2. Step 2: Convert to fraction form
    547.89/821.90 = 223.48/x
  3. Step 3: Cross multiply
    547.89x = 821.90 × 223.48
  4. Step 4: Simplify right side
    547.89x = 183,678.21
  5. Step 5: Solve for x
    x = 183,678.21/547.89
  6. Step 6: Final answer
    x = 335.25

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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.