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Finding the Fourth Proportional to 215.10, 296.82 and 136.43

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Solution

The fourth proportional to 215.10, 296.82 and 136.43 is: 188.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.10 : 296.82 = 136.43 : x
  2. Step 2: Convert to fraction form
    215.10/296.82 = 136.43/x
  3. Step 3: Cross multiply
    215.10x = 296.82 × 136.43
  4. Step 4: Simplify right side
    215.10x = 40,495.15
  5. Step 5: Solve for x
    x = 40,495.15/215.10
  6. Step 6: Final answer
    x = 188.26

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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.