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Finding the Fourth Proportional to 186.16, 279.48 and 143.44

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Solution

The fourth proportional to 186.16, 279.48 and 143.44 is: 215.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.16 : 279.48 = 143.44 : x
  2. Step 2: Convert to fraction form
    186.16/279.48 = 143.44/x
  3. Step 3: Cross multiply
    186.16x = 279.48 × 143.44
  4. Step 4: Simplify right side
    186.16x = 40,088.61
  5. Step 5: Solve for x
    x = 40,088.61/186.16
  6. Step 6: Final answer
    x = 215.34

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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.