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Finding the Fourth Proportional to 215.19, 296.96 and 126.64

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Solution

The fourth proportional to 215.19, 296.96 and 126.64 is: 174.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.19 : 296.96 = 126.64 : x
  2. Step 2: Convert to fraction form
    215.19/296.96 = 126.64/x
  3. Step 3: Cross multiply
    215.19x = 296.96 × 126.64
  4. Step 4: Simplify right side
    215.19x = 37,607.01
  5. Step 5: Solve for x
    x = 37,607.01/215.19
  6. Step 6: Final answer
    x = 174.76

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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.