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Finding the Fourth Proportional to 547.70, 821.70 and 223.30

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Solution

The fourth proportional to 547.70, 821.70 and 223.30 is: 335.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.70 : 821.70 = 223.30 : x
  2. Step 2: Convert to fraction form
    547.70/821.70 = 223.30/x
  3. Step 3: Cross multiply
    547.70x = 821.70 × 223.30
  4. Step 4: Simplify right side
    547.70x = 183,485.61
  5. Step 5: Solve for x
    x = 183,485.61/547.70
  6. Step 6: Final answer
    x = 335.01

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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.