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Finding the Fourth Proportional to 185.69, 279.14 and 155.31

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Solution

The fourth proportional to 185.69, 279.14 and 155.31 is: 233.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.69 : 279.14 = 155.31 : x
  2. Step 2: Convert to fraction form
    185.69/279.14 = 155.31/x
  3. Step 3: Cross multiply
    185.69x = 279.14 × 155.31
  4. Step 4: Simplify right side
    185.69x = 43,352.46
  5. Step 5: Solve for x
    x = 43,352.46/185.69
  6. Step 6: Final answer
    x = 233.47

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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.