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Finding the Fourth Proportional to 186.34, 257.07 and 130.99

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Solution

The fourth proportional to 186.34, 257.07 and 130.99 is: 180.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.34 : 257.07 = 130.99 : x
  2. Step 2: Convert to fraction form
    186.34/257.07 = 130.99/x
  3. Step 3: Cross multiply
    186.34x = 257.07 × 130.99
  4. Step 4: Simplify right side
    186.34x = 33,673.60
  5. Step 5: Solve for x
    x = 33,673.60/186.34
  6. Step 6: Final answer
    x = 180.71

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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.