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Finding the Fourth Proportional to 186.80, 281.48 and 155.01

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Solution

The fourth proportional to 186.80, 281.48 and 155.01 is: 233.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.80 : 281.48 = 155.01 : x
  2. Step 2: Convert to fraction form
    186.80/281.48 = 155.01/x
  3. Step 3: Cross multiply
    186.80x = 281.48 × 155.01
  4. Step 4: Simplify right side
    186.80x = 43,632.21
  5. Step 5: Solve for x
    x = 43,632.21/186.80
  6. Step 6: Final answer
    x = 233.58

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.