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Finding the Fourth Proportional to 215.16, 296.79 and 136.41

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Solution

The fourth proportional to 215.16, 296.79 and 136.41 is: 188.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.16 : 296.79 = 136.41 : x
  2. Step 2: Convert to fraction form
    215.16/296.79 = 136.41/x
  3. Step 3: Cross multiply
    215.16x = 296.79 × 136.41
  4. Step 4: Simplify right side
    215.16x = 40,485.12
  5. Step 5: Solve for x
    x = 40,485.12/215.16
  6. Step 6: Final answer
    x = 188.16

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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.