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Finding the Fourth Proportional to 173.74, 239.79 and 155.50

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Solution

The fourth proportional to 173.74, 239.79 and 155.50 is: 214.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.74 : 239.79 = 155.50 : x
  2. Step 2: Convert to fraction form
    173.74/239.79 = 155.50/x
  3. Step 3: Cross multiply
    173.74x = 239.79 × 155.50
  4. Step 4: Simplify right side
    173.74x = 37,287.35
  5. Step 5: Solve for x
    x = 37,287.35/173.74
  6. Step 6: Final answer
    x = 214.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.