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Finding the Fourth Proportional to 187.01, 281.76 and 155.21

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Solution

The fourth proportional to 187.01, 281.76 and 155.21 is: 233.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.01 : 281.76 = 155.21 : x
  2. Step 2: Convert to fraction form
    187.01/281.76 = 155.21/x
  3. Step 3: Cross multiply
    187.01x = 281.76 × 155.21
  4. Step 4: Simplify right side
    187.01x = 43,730.56
  5. Step 5: Solve for x
    x = 43,730.56/187.01
  6. Step 6: Final answer
    x = 233.85

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.