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Finding the Fourth Proportional to 215.02, 296.79 and 126.51

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Solution

The fourth proportional to 215.02, 296.79 and 126.51 is: 174.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.02 : 296.79 = 126.51 : x
  2. Step 2: Convert to fraction form
    215.02/296.79 = 126.51/x
  3. Step 3: Cross multiply
    215.02x = 296.79 × 126.51
  4. Step 4: Simplify right side
    215.02x = 37,546.90
  5. Step 5: Solve for x
    x = 37,546.90/215.02
  6. Step 6: Final answer
    x = 174.62

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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.