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Finding the Fourth Proportional to 187.02, 257.71 and 174.05

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Solution

The fourth proportional to 187.02, 257.71 and 174.05 is: 239.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.02 : 257.71 = 174.05 : x
  2. Step 2: Convert to fraction form
    187.02/257.71 = 174.05/x
  3. Step 3: Cross multiply
    187.02x = 257.71 × 174.05
  4. Step 4: Simplify right side
    187.02x = 44,852.70
  5. Step 5: Solve for x
    x = 44,852.70/187.02
  6. Step 6: Final answer
    x = 239.83

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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.