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Finding the Fourth Proportional to 547.47, 821.11 and 162.63

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Solution

The fourth proportional to 547.47, 821.11 and 162.63 is: 243.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.47 : 821.11 = 162.63 : x
  2. Step 2: Convert to fraction form
    547.47/821.11 = 162.63/x
  3. Step 3: Cross multiply
    547.47x = 821.11 × 162.63
  4. Step 4: Simplify right side
    547.47x = 133,537.12
  5. Step 5: Solve for x
    x = 133,537.12/547.47
  6. Step 6: Final answer
    x = 243.92

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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.