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Finding the Fourth Proportional to 547.68, 821.68 and 223.20

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Solution

The fourth proportional to 547.68, 821.68 and 223.20 is: 334.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.68 : 821.68 = 223.20 : x
  2. Step 2: Convert to fraction form
    547.68/821.68 = 223.20/x
  3. Step 3: Cross multiply
    547.68x = 821.68 × 223.20
  4. Step 4: Simplify right side
    547.68x = 183,398.98
  5. Step 5: Solve for x
    x = 183,398.98/547.68
  6. Step 6: Final answer
    x = 334.87

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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.