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Finding the Fourth Proportional to 301.32, 415.72 and 208.12

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Solution

The fourth proportional to 301.32, 415.72 and 208.12 is: 287.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    301.32 : 415.72 = 208.12 : x
  2. Step 2: Convert to fraction form
    301.32/415.72 = 208.12/x
  3. Step 3: Cross multiply
    301.32x = 415.72 × 208.12
  4. Step 4: Simplify right side
    301.32x = 86,519.65
  5. Step 5: Solve for x
    x = 86,519.65/301.32
  6. Step 6: Final answer
    x = 287.14

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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.