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Finding the Fourth Proportional to 215.93, 325.05 and 196.79

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Solution

The fourth proportional to 215.93, 325.05 and 196.79 is: 296.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.93 : 325.05 = 196.79 : x
  2. Step 2: Convert to fraction form
    215.93/325.05 = 196.79/x
  3. Step 3: Cross multiply
    215.93x = 325.05 × 196.79
  4. Step 4: Simplify right side
    215.93x = 63,966.92
  5. Step 5: Solve for x
    x = 63,966.92/215.93
  6. Step 6: Final answer
    x = 296.25

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.