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Finding the Fourth Proportional to 215.21, 296.84 and 208.07

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Solution

The fourth proportional to 215.21, 296.84 and 208.07 is: 286.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.21 : 296.84 = 208.07 : x
  2. Step 2: Convert to fraction form
    215.21/296.84 = 208.07/x
  3. Step 3: Cross multiply
    215.21x = 296.84 × 208.07
  4. Step 4: Simplify right side
    215.21x = 61,763.65
  5. Step 5: Solve for x
    x = 61,763.65/215.21
  6. Step 6: Final answer
    x = 286.99

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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.