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Finding the Fourth Proportional to 186.23, 257.04 and 130.98

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Solution

The fourth proportional to 186.23, 257.04 and 130.98 is: 180.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.23 : 257.04 = 130.98 : x
  2. Step 2: Convert to fraction form
    186.23/257.04 = 130.98/x
  3. Step 3: Cross multiply
    186.23x = 257.04 × 130.98
  4. Step 4: Simplify right side
    186.23x = 33,667.10
  5. Step 5: Solve for x
    x = 33,667.10/186.23
  6. Step 6: Final answer
    x = 180.79

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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.