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Finding the Fourth Proportional to 553.02, 829.70 and 187.78

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Solution

The fourth proportional to 553.02, 829.70 and 187.78 is: 281.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.02 : 829.70 = 187.78 : x
  2. Step 2: Convert to fraction form
    553.02/829.70 = 187.78/x
  3. Step 3: Cross multiply
    553.02x = 829.70 × 187.78
  4. Step 4: Simplify right side
    553.02x = 155,801.07
  5. Step 5: Solve for x
    x = 155,801.07/553.02
  6. Step 6: Final answer
    x = 281.73

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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.