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Finding the Fourth Proportional to 302.19, 416.97 and 171.21

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Solution

The fourth proportional to 302.19, 416.97 and 171.21 is: 236.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.19 : 416.97 = 171.21 : x
  2. Step 2: Convert to fraction form
    302.19/416.97 = 171.21/x
  3. Step 3: Cross multiply
    302.19x = 416.97 × 171.21
  4. Step 4: Simplify right side
    302.19x = 71,389.43
  5. Step 5: Solve for x
    x = 71,389.43/302.19
  6. Step 6: Final answer
    x = 236.24

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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.