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Finding the Fourth Proportional to 302.19, 416.99 and 171.20

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Solution

The fourth proportional to 302.19, 416.99 and 171.20 is: 236.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.19 : 416.99 = 171.20 : x
  2. Step 2: Convert to fraction form
    302.19/416.99 = 171.20/x
  3. Step 3: Cross multiply
    302.19x = 416.99 × 171.20
  4. Step 4: Simplify right side
    302.19x = 71,387.81
  5. Step 5: Solve for x
    x = 71,387.81/302.19
  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.