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Finding the Fourth Proportional to 186.46, 279.59 and 90.26

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Solution

The fourth proportional to 186.46, 279.59 and 90.26 is: 135.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.46 : 279.59 = 90.26 : x
  2. Step 2: Convert to fraction form
    186.46/279.59 = 90.26/x
  3. Step 3: Cross multiply
    186.46x = 279.59 × 90.26
  4. Step 4: Simplify right side
    186.46x = 25,235.79
  5. Step 5: Solve for x
    x = 25,235.79/186.46
  6. Step 6: Final answer
    x = 135.34

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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.