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Finding the Fourth Proportional to 553.20, 829.67 and 187.89

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Solution

The fourth proportional to 553.20, 829.67 and 187.89 is: 281.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.20 : 829.67 = 187.89 : x
  2. Step 2: Convert to fraction form
    553.20/829.67 = 187.89/x
  3. Step 3: Cross multiply
    553.20x = 829.67 × 187.89
  4. Step 4: Simplify right side
    553.20x = 155,885.76
  5. Step 5: Solve for x
    x = 155,885.76/553.20
  6. Step 6: Final answer
    x = 281.79

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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.