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Finding the Fourth Proportional to 187.17, 280.75 and 50.21

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Solution

The fourth proportional to 187.17, 280.75 and 50.21 is: 75.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.17 : 280.75 = 50.21 : x
  2. Step 2: Convert to fraction form
    187.17/280.75 = 50.21/x
  3. Step 3: Cross multiply
    187.17x = 280.75 × 50.21
  4. Step 4: Simplify right side
    187.17x = 14,096.77
  5. Step 5: Solve for x
    x = 14,096.77/187.17
  6. Step 6: Final answer
    x = 75.32

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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.