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Finding the Fourth Proportional to 239.25, 330.32 and 186.70

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Solution

The fourth proportional to 239.25, 330.32 and 186.70 is: 257.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.25 : 330.32 = 186.70 : x
  2. Step 2: Convert to fraction form
    239.25/330.32 = 186.70/x
  3. Step 3: Cross multiply
    239.25x = 330.32 × 186.70
  4. Step 4: Simplify right side
    239.25x = 61,671.57
  5. Step 5: Solve for x
    x = 61,671.57/239.25
  6. Step 6: Final answer
    x = 257.77

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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.